Payment gateway dotnetnukepráce

Coinify bohužel není schopná v dohledném čase připravit svoji platební bránu pro WHMCS 8.x, nejnovější podporovná verze je 6.3.1 (výsměch, co?), ono to nějak funguje i pod 7.9.1 (kterou aktuálně používáme), ale hlásí to chybu pro platby menší než 0.001BTC, pravděpodobně se jedná jen o špatně definovaný typ proměnné, potřeboval bych to opravit.

...GoPay (Czech payment gateway) integration with Shopify as a third-party gateway. We right now have some small issues we need help with regarding backend codebase. We need someone experienced with REST API’s and ideally with payment gateways. API’s CZ Stack Node backend aplikace napsaná v asynchronně, frontend je v react.js. Co je za problém? Máme GoPay integraci pro Shopify, nyní však nemáme kapacitu na to se o aplikaci starat a vznikly tam některé potíže které se týkají backend části, proto hledáme někoho zkušeného s REST API a nejlépe integrací něčeho podobného který by nám s tí...

We are looking f...interface, innovative and allow for easy navigation. The ideal candidate should have expertise in Telegram bot development, web development, and crypto payment integrations. We might hire an third party UIX designer that has the same style that we desire. For the frontend and backend development, we do either like to hire an incredibly capable fullstack developer who can take on such an challenge or preferably a team/agency of developers who can do this project. We will require high quality on the finished product, and that this website is made with security in mind Relevant Skills: - Telegram bot development - Web development - Payment gateway integration - User registration and management - Escrow management - Dispute resolution - Transaction tr...

...development of a user-friendly, responsive e-commerce site - Integration of Shopify's e-commerce platform - Product listings and categorization for Clothing and Accessories, as well as Electronics and Gadgets - Payment gateway integration - Mobile optimization Ideal skills and experience for this job: - Proficiency in Shopify development - Understanding of e-commerce and online consumer behavior, particularly for young adults - UI/UX design skills for an engaging e-commerce experience - Knowledge of product categorization and listing optimization - Prior experience with payment gateway integration - Ability to optimize the website for mobile devices Please provide examples of similar e-commerce websites you have built on Shopify, and a clear breakdown ...

I'm seeking a specialised CodeIgnitor and phpMyAdmin expert to enhance my betting website's backend. As part of a 5-hour daily commitment, the role involves: - Integrating a UPI payment gateway in the admin panel. I've chosen Google Pay as the preferred UPI platform. - Setting up data analytics and reporting, crucial for measuring and optimizing our betting system's performance. Prior experience with betting sites, UPI integrations and systems reporting is desirable. If you're a driven problem solver who enjoys developing sophisticated functionalities, I'd love to hear from you.

I need a talented VB.net developer with a strong background in SQL Server. Key Responsibilities: - Develop software applications using VB.net - Efficiently manage databases - Designing, coding, testing, and debugging software applications using VB.NET. - Calling third-party API - Payment gateway integration - Stored Procedure Ideal Candidate: - Proven experience in VB.net development - Strong familiarity with SQL Server - Good problem-solving skills - Ability to work independently and meet deadlines. Please provide relevant work samples in VB.net development and describe your experience with SQL Server.

...and customers to create accounts. - Search Functionality: Clients should be able to search for beauty professionals based on their services and availability. - Booking and Payment: Seamless booking and secure payment processing. - Calendar View for Schedule: A clear and organized view of the availability of service providers. - SMS Reminder: Automated reminders to reduce no-shows. - Partial Section for Advertisement: A space for beauty professionals to promote their services. Ideal Skills: - Experience in developing multi-platform applications. - Proficiency in user-friendly design. - Knowledge of secure payment gateway integration. - Previous experience with calendar-based applications. - Understanding of SMS integration for reminders. - Ability to implemen...

...located at: Desktop: PWA: For the design of our Progressive Web App, we used the OpenTable application as the inspiration. Similar applications that have the same functionality as our sites are: Airbnb Zillow Our application currently has approximately 20 screens and includes payment processing through our own custom gateway. QUALIFICATIONS Minimum 4 Years experience with Mobile App development, with at 2 years of experience with Flutter framework Provide at least THREE (3) live and working Mobile Apps that you have developed using Flutter or React Native Strong familiarity with both iOS and Android development environments, SDKs. Previous experience implementing user authentication systems.

...decisions, I am seeking an expert to create a data analytics tool from scratch using ReactJS and AWS. The tool will analyze an array of data sources and present the results using insightful visualization techniques. Here are the requirements: - Implement Amazon Cognito for user authentication and authorization - Utilize AWS Amplify for the app's development and deployment - Integrate AWS API Gateway for efficient data exchange - Integrate Stripe for payments. Need complete flow Our tech stack looks like: - Amazon Amplify for app backend, and front end - Gatsby JS coupled with AppSync for front end - Amplify UI and MUI Material for UI components Features that I need: - End to end user journey - from login/registration to offering profile capture, to custom subscriptions -...

Project Overview: We are looking for a talented web developer or development team to transform our Excel workbook into a dynamic subscription-based web application. This workbook is integral to the operations of multiple educational institutions, featuring data management, automated calculations, and repor...Design the system to manage large volumes of data with the capability to scale as user base and data grow. Interactive Reporting and Dashboards: Tools for generating customizable reports and dashboards that can adapt to new data inputs and formats. Automated Workflow Integration: Convert existing Excel macros into automated digital workflows in the web environment. Payment and Subscription Handling: Integrate a flexible payment gateway to manage different subscript...

I'm looking for a skilled developer to integrate PayPal as the payment gateway and provide real-time shipping rates into my Odoo 17 platform. Additionally, I need to set up WhatsApp for customer support chat. Key Responsibilities: - Integrate PayPal as the payment gateway. - Implement real-time shipping rates. - Set up WhatsApp for customer support chat. Ideal Skills and Experience: - Proficient in Odoo 17 development. - Extensive experience in integrating PayPal. - Knowledge of setting up real-time shipping rates. - Prior experience in configuring WhatsApp integration for customer support is a plus.

I'm looking to develop an online payment website that will support transactions made using credit cards and bank transfers. The payment process should include collecting the following user information: - Name - Email address - Phone number - ID verification The ideal site should be compatible with desktop computers, mobile devices, and tablets. I need an experienced developer who is familiar with payment gateway integration and security protocols. Experience with ID verification processes would be a plus. As reference, the website should be the same as - escrow.com Please list your estimated fixed price and work duration.

I'm in need of a skilled WordPress developer with experience in e-commer...both domain and hosting, so your expertise on this matter is not necessary. - The primary goal of my website is to sell products or services online, so you should have proven experience in creating successful e-commerce platforms. - Specific e-commerce features needed include payment gateway integration, customer reviews and ratings, and the ability to post blogs. Your skills should include: - Proficiency in WordPress development - Strong understanding of e-commerce functionalities - Experience in integrating payment gateways - Ability to implement customer reviews and ratings system - Knowledge on how to create and manage blog posts Please provide examples of your previous e-commerce Wo...

I am looking for a skilled web developer who can create an e-commerce website from scr...can create an e-commerce website from scratch that focuses on user experience. Project features should include: - User Registration and Login: The website should have a secure, easy-to-use registration and login system to ensure security for our clients. - Payment Gateway Integration: To ease the purchasing process, a payment gateway should be integrated to handle all transactions. Specific skills and experience required: - E-commerce website development - Experience with user registration and login systems - Experience with payment gateway integration Please note that product types to be sold on the website are yet to be determined. This information will be...

I'm looking for an expert in setting up a Kannel SMS Gateway with a SIM box. The purpose of this project is to send marketing messages on a large scale of between 1,000 and 5,000 daily. The messages will not be text-only, they will include both images and links as well. Ideal Skills: - Extensive experience with Kannel SMS gateway and SIM box configuration - Understanding of marketing message composition with text, image, and link - Knowledge of Bulk SMS sending Key Requirements: - Ability to send between 1,000 and 5,000 SMS daily - Ensure efficient delivery of all text, image, and link content - Optimize the system while maintaining high deliverability rates Your ability to effectively set this up can make a huge difference in our communication strategy. If these pa...

I'm in need of a skilled NodeJS developer who has already integrated the Telr payment gateway. Key Points: - I have an active Telr payment gateway account, and my main objective is to use it for processing online payments for servicesm with refund/cancelation. Ideal Skills and Experience: - Previous experience with Telr integration is a must. Having a working knowledge of their API and the ability to seamlessly integrate it with my NodeJS backend.

I'm looking for a skilled Codeigniter developer to help me with a specific task. - The Purpose: I've already got a Codeigniter project up and running but I'm looking to expand it by adding new modules. - The Module: Specifically, I need help with integrating a new Fees Payments system. - Payment Gateway: The system will need to process Credit Card and Cash Payments. - Skills: I'm looking for someone with a strong understanding of Codeigniter framework, and experience with the aforementioned payment methods. If you have the expertise required, I would love to hear from you.

...collaborate with a skilled professional who can develop a comprehensive strategy deck tailored specifically for our internal team members. Key Deliverables: - Develop a strategy deck that focuses on the landscape of UK market and payment acceptance methods - Prioritize market penetration and growth strategies - Provide detailed competitor analysis and insights - Include visuals and concise data to engage the internal team Ideal Skills and Experience: - Proven experience in strategy development for fintech or e-commerce - In-depth knowledge of the European payment landscape, particularly in the UK - Strong research and analytical skills to provide competitor insights - Excellent communication and presentation skills to engage and inform the internal team It's cruci...

I'm looking for a mobile app developer to create a cross-platform service app similar to URBAN CLAP. The app should be available on both Android and iOS dev...accounts and log in securely. - Service Provider Registration: A feature that allows service providers to register and offer their services on the app. - Service Booking: Users should be able to browse available services, select, and book them. - Payment Integration: A secure payment gateway should be implemented to facilitate transactions between users and service providers. Ideal Skills and Experience: - Proficient in cross-platform app development - Knowledge of creating user-friendly and engaging interfaces - Experience in integrating secure payment gateways - Previous experience in developing se...

Required competencies : Wordpress Inspiro theme Exclusion /Out of scope : No payment gateway SEO Design of logos / photos / icons Volume : 17 pages Number of photos/icons : 140 Number of blocks : 55 Number of videos : 5 We are looking for a WordPress developer to create a new website using the Inspiro theme. The ideal candidate will have prior experience with WordPress and the Inspiro theme, and a portfolio showcasing past projects. Project Details: Objective: Build a complete website using WordPress with the Inspiro theme. Scope: The website will consist of approximately 17 pages. Content and a basic design model from Canva will be provided, which should be closely followed to match our vision. Please note, the website content will be in French; however, profi...

I'm seeking an Excel expert to help me with data analysis, formulas, and pivot tables. I work with Excel 2019. Key Responsibilities: - I want to see the mode of payment according to date wise in report sheet according to datewise Ideal skills and experience: - Proficient in Excel 2019. - Expertise in data analysis, formulas, and pivot tables. - Experience in creating automated reports or dashboards (desirable but not mandatory). - Excellent communication and problem-solving skills.

...platforms. This application should feature a user registration and login capability, thereby creating personalized experiences. Here's what is needed: Features - User registration and login feature for personalized use. - Facility to book bus tickets. - Support for credit card and debit card payments. Ideal Skills - Proficiency in Android and Web development. - Excellent understanding of payment gateway integration, specifically debit and credit cards. - Experience in developing applications with user registration and login features. - A portfolio with similar apps might give you an edge. This project demands a high degree of user-friendliness, secure transactions, and flawless functionality. Any suggestions to enhance user experience or functionality are welco...

I'm in need of a talented PHP Nextjs developer for a project involving a range of tasks including Backend development, Frontend devel...must for this project. Specific Features: - User Authentication: You'll be responsible for implementing a secure and user-friendly authentication system. - Database Integration: You should have a strong background in database management and integration. - Payment Gateway Integration: Experience with payment gateway integration is a must. Ideal Skill Set: - Proficiency in PHP and JavaScript - Extensive experience with - Strong knowledge of API integration - Expertise in user authentication, database integration, and payment gateway integration If you're confident in your skills and believe you can...

I am currently utilizing the WooCommerce MPGS payment gateway on my WordPress site. I am seeking a skilled WordPress developer to update the WooCommerce MPGS plugin on my site.

...developer to focus on backend development. The primary task is to integrate a payment gateway. We followed the instructions provided and implemented the following code using server-side Node.js. We utilized ngrok to enable HTTPS connections. We have successfully initiated a transaction using this code in the uploaded file. However, we encountered an issue retrieving the transaction, which should have been provided but is not available. We were advised to handle callbacks and decrypt the response, but we're facing difficulties in doing so. Handling callbacks and post-success payment URLs did not resolve the issue. We now need the transaction ID, which we are unable

I am looking for a versatile developer to create an ecommerce application that will run on both iOS and Android. The application must include the following features: - Facilitate user re...application that will run on both iOS and Android. The application must include the following features: - Facilitate user registration and profile management - Allow product listing and search capabilities - Include a functional shopping cart and checkout process An imperative aspect of this project is the integration of external payment gateways to support the checkout process. It's therefore essential for the ideal candidate to have previous experience with payment gateway integration. The ability to cross-code for both Android and iOS platforms is essential due to the dual...

I need a skilled developer to integrate an International Payment Gateway into my PHP-based website immediately. Integration of Payment Getway in the website which will accept USD and this should work in Both Indian people and Other Countries. Website URL is - freelancerbridge(dot)com

I'm looking for an expert who can streamline our payment matching process by integrating Xero with our Procurement system. Key Requirements: - **Manual Matching Override Capability**: The ability to manually match transactions is crucial as it allows us to handle exceptions and discrepancies effectively. Current Discrepancy Handling: - Discrepancies between the systems are currently addressed via manual review and adjustment. The integration should help minimize these instances and make the process more efficient. Ideal Skills and Experience: - Experience in integrating Xero with Procurement systems is a plus. - A good understanding of financial processes and payment matching. - Ability to develop a system that allows for manual override matching. - Proven track...

I'm looking for an expert developer to build an e-commerce website targeted at selling dig...your role will include: • Website Development: Designing and setting up an e-commerce site using modern UX/UI principles for easy navigation and accessibility. • Payment Gateway Integration: Incorporating PayPal as an integral part of our site to process transactions smoothly. • Products Display: Designing an engaging display for our digital products to promote sales. Ideal candidates should have: • Extensive experience with creating e-commerce websites. • Proven experience integrating PayPal into a website. • Experience in digital product display and management. Your success will be gauged by the seamless integration of the payment system...

Description: I'm seeking an experienced AWS and Django developer to urgently fix a "502 Bad Gateway" error that started occurring on my Django-based website hosted on an AWS EC2 instance after an IAM role change. The task will also involve reviewing and revoking AWS access previously granted to a developer, and ensuring the site's security and integrity. Responsibilities: Diagnose and resolve the "502 Bad Gateway" error. Review and modify IAM permissions to ensure both security and functionality. Confirm that all components of the AWS environment (like EC2, RDS) are properly configured and interacting without issues. Ensure the Django application is securely configured and fully operational. Provide a brief report on the changes made and any re...

...skilled developer to enhance the online appointment and payment system on my website. - **Current System**: We are currently using Fittlebug for our online appointment scheduling system. The new system will need to be compatible and integrated with this existing platform. - **Key Features**: We aim to incorporate the following features into the new system: - Real-time Availability: Customers should be able to see real-time availability and book accordingly. - Automatic Reminders: The system should automatically send reminders to customers before their appointment. - Payment Integration: The system should facilitate payment for appointments. - **Payment Integration Details**: Although we're considering integrating an online payment gate...

I'm seeking an experienced web developer with extensive knowledge in WIX and payment gateway integration to build the checkout system of our bulk ice selling business' website. Key tasks include: 1. **Payment Gateway Integration**- The checkout system should incorporate a payment gateway to facilitate secure transactions. 2. **Delivery Address Input** - Allowing customers to input their delivery address to ensure proper and accurate delivery of our products. 3. **Order Confirmation Email** - After a successful purchase, an order confirmation email should be sent to customers for their records. 4. **Design** - Implement a simple and clean design that aligns with the website's current aesthetic. 5. **Delivery Tracking** - Incorp...

I'm looking for an expert to design and implement an ecommerce website for my Kansas-based CBD business. Key Features: - The website should have a product catalog to di...an expert to design and implement an ecommerce website for my Kansas-based CBD business. Key Features: - The website should have a product catalog to display my 50-100 CBD products. - It should include a shopping cart feature for seamless transactions. - Integration of payment gateways, specifically credit/debit cards and PayPal, is crucial for the website's functionality. Ideal Applicant: - Proven experience in ecommerce website design, specifically with product catalogs. - Proficient in shopping cart and payment gateway integrations. - Understanding of the legalities around selling CB...

I'm looking to build a Shopi...and women. Key requirements: - Developing an engaging and user-friendly eCommerce platform on Shopify - Designing for both genders, with a focus on a clean and professional look - Integrating payment gateways and ensuring a smooth process for customers - Optimizing for mobile responsiveness I'm also considering adding a blog section in the future, so I'm open to suggestions on this. Ideal Skills: - Prior experience in building eCommerce websites on Shopify - Strong design skills, particularly in creating gender-neutral designs - Knowledge of SEO and web optimization - Familiarity with payment gateway integrations. Please provide portfolios of similar projects you've completed. Your input on the blog section is we...

As the name suggests, i am looking for somebody who could potentially make me some software that can scan the DVSA government website automatically and be able to find me any test cancellation dates. However, this wouldn't be on the public dvsa website, but for the driving instructor portal (only accessible with a valid government gateway ID [which i will provide]). Further details will be ironed out.

Job Description: We are seeking an experienced Backend Developer to develop and maintain our next-generation VPN server software and Wireguard exit nodes. Our goal is to provide secure VPN connectivity through our OpenWrt-based router firmware. The successful candidate will be responsible for developing a robust VPN server software or internet gateway software that can authenticate the certificates, keys, or other authentication methods sent by our existing client software and grant internet access. The software should be compatible with both rented hosting solutions and in-house servers. Additionally, you will be tasked with creating comprehensive server software instructions to enable easy deployment and management by non-technical personnel. Key Responsibilities: 1. Develop ...

...my brand image. Key Requirements: - Development of a product catalog with detailed descriptions and prices - Inclusion of a shopping cart and a seamless checkout experience - Integration of online ordering and payment functionalities - Payment gateway setup to accommodate credit card and bank transfer options - Customization to align with an elegant and sophisticated design style Ideal Skills and Experience: - Proficiency in e-commerce development and CRM integration - Strong portfolio of elegant and sophisticated web design projects - Previous experience with integrating payment gateways - Excellent understanding of user experience and online shopping best practices is wordpress Need also to edit the website to look better! Need to create a shop whe...

...from a remote source and integrating a cryptocurrency payment option into my website. - Data Fetching: The fetched data, which will be in HTML format, should be displayed on a specific page of my site. Your task will be to use CURL to retrieve this content and have it dynamically updated on the website whenever the remote source updates. - Cryptocurrency Payment: I'd also like to have a cryptocurrency payment option incorporated into the site. The checkout should be seamless and intuitive for users, with the ability to complete transactions using popular cryptocurrencies. Ideal candidates for this project should have: - Proficiency in PHP and experience with CURL for data fetching - Prior experience setting up cryptocurrency payment gateways - A keen...

I'm seeking the expertise of a Laravel developer who's at least a beginner but possesses a solid understanding of user authentication, database integration, and payment gateway integration. The primary goal of this project is to build a web application. Skills and Experience Needed: - Beginner to intermediate level experience in Laravel development - Proficient in user authentication methods - Understanding of database integration within web applications - Familiarity with integrating payment gateways This project offers an opportunity to apply and further develop these essential web development skills. Your input will be absolutely crucial in taking this web application from concept to a tangible, fully functioning technology.

...product inventory with a supplier's database. This means the site must be capable of handling automatic updates and stock levels. - Payment Methods: I intend to offer Credit Card Payments, UPI, and Debit Card payment methods on the site. Ideal Skills and Experience: - Proficient in Woocommerce: You should have a strong background in working with the Woocommerce platform, with a focus on e-commerce design and development. - Inventory Management Expertise: Experience in integrating and managing automated inventory systems is a plus, particularly with supplier databases. - Payment Gateway Integration: Proven experience in setting up and integrating various payment methods, like Credit Card Payments, UPI, and Debit Card, is highly desirable. - Most o...

...Product Catalog Management: The ability to easily create, update, and manage product listings on my online store. - Shopping Cart: A user-friendly interface that allows customers to add items to their cart and proceed to checkout smoothly. - Payment Gateway Integration: Secure and reliable integration with popular payment gateways to facilitate seamless online transactions. Ideal Skills: - Proficiency in developing ERP systems with a focus on retail and inventory management. - Experience in e-commerce website development. - Prior knowledge of integrating payment gateways. - Familiarity with CRM systems and their implementations. If you have a strong background in these areas and are confident in delivering a high-quality, efficient, and user-friendly ERP sy...

I would like a skilled Laravel developer to integrate PagSeguro's payment gateway into my website, including Boleto bancário and Pix. Key Project Requirements: - Integrate Boleto Bancário: The system should generate boleto slips, track boleto payments, and handle the necessary validations. - Include Pix: The system should support payments via Pix, a new and increasingly popular payment method in Brazil. Ideal Skills and Experience: - Proven experience with integrating payment gateways into Laravel applications. - Familiarity with PagSeguro's API and requirements. - Knowledge of Boleto Bancário and Pix payment systems. - Strong understanding of Laravel best practices. The project needs to be completed within a month. Pleas...

...The successful candidate will need to be able to incorporate plugins into the site for enhanced functionality. Specific Plugins/Integrations: - Payment Gateway Integration: Users may need to make payments on the site, so a secure payment gateway is needed. - Social Media Login Integration: To streamline the registration process and enhance user engagement. - Filtering/Algorithm: The use of filtering or an algorithm to tailor the content to individual users' preferences. Skills and Experience: - Extensive experience in full stack web development. - Proven track record with social networking site creation. - Strong understanding of payment gateway integration. - Proficiency in social media APIs and plugin development. - Creative problem-sol...

...for an adult audience and the key functionality will be payment processing. Ideal Skills: - Experience in cross-platform mobile app development (both Android and Apple) - Expertise in PayPal API - A clear understanding of secure payment processing - Code Review will be carried out as part of the testing process Expected Output: - A smooth, intuitive cross-platform app - Seamless and secure payment processing utilizing PayPal. Candidates should have a strong portfolio showcasing similar projects. If this sounds like you, please bid with your plan of action and expected timeline. The Project: There is a requirement to develop a piece of code that; 1. Retrieves the names of four individuals from a server 2. Sends a single payment to the four individuals ...

I'm looking for a developer who already has pre-built car rental software. The software should have the following features: - Vehicle inventory management - Online booking system - Payment gateway integration I need to customize this software to cater to the needs of tourists. This includes making the booking system user-friendly and ensuring that the payment gateway is secure and internationally accessible. Ideal candidate will have experience in: - PHP development - Software customization - Familiarity with car rental industry Your understanding of both PHP and the challenges of tourism will be a huge plus. The project requires someone who can hit the ground running and deliver a high-quality, user-friendly solution.

...existing PHP script. The scope of work involves: - Adding new functionalities: Specifically, I am seeking to integrate payment gateway and app, as well as implement a subscription wallet and automated payments system. A background in financial integration technologies is preferred. - Modifying existing features: Notably, the user profile management feature and data management & reporting functionality need revisions. Experience in generating robust user interfaces and crafting intuitive data management systems will be key. Prospective freelancers should have demonstrated experience with PHP, user interface creation and data management tools. Proven skills in payment gateway and app integration will strongly favor your application. Proactive communicat...

I have an account with Billdesk Payment Gateway and I need to integrate it into my ASP.NET platform. Key Requirements: - Integration should be focused on processing online payments. - No particular security features for the payment integration were specified. The ideal candidate for this project should have: - Proven experience in integrating payment gateways, particularly Billdesk. - Proficiency in ASP.NET and related technologies. - Strong understanding of online payment processing. - Ability to ensure smooth and secure transaction flow.

I'm seeking a skilled developer to set up Apple In-App Purchase functionality within two of my busin...within two of my business-focused applications. The ultimate aim of these applications is to allow users to purchase online radio codes. Key tasks: - Implementing Apple In-App Purchase in both apps - Configuring the apps in my Apple Developer Console to take them live - Expertly integrating payment gateways for seamless radio code purchases Ideal Candidate: The perfect candidate will possess: - Proven experience in integrating Apple In-App Purchase into business apps - Expertise in payment gateway integration - A strong understanding of Apple Developer Console setup and operation - A background in business app creation, ideally with a focus on selling digit...

Troubleshooting for the WordPress website

Resolved Azure web app service error. 502 - Web server received an invalid response while acting as a gateway or proxy server. There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server.