{"id":77222,"date":"2023-02-03T10:44:17","date_gmt":"2023-02-03T10:44:17","guid":{"rendered":"\/tutorials\/?p=77222"},"modified":"2026-03-10T10:23:58","modified_gmt":"2026-03-10T10:23:58","slug":"how-to-fix-err-quic-protocol-error","status":"publish","type":"post","link":"\/in\/tutorials\/how-to-fix-err-quic-protocol-error","title":{"rendered":"How to Fix ERR_QUIC_PROTOCOL_ERROR in Google Chrome: 3 Methods"},"content":{"rendered":"

Despite being a widely-used web browser, Google Chrome is still prone to errors that can hinder your site’s accessibility. One of them is ERR_QUIC_PROTOCOL_ERROR<\/strong>. Unlike most HTTP status code error messages, it occurs when the browser is unable to reach the web server using the QUIC protocol.<\/p>

Such an error makes your site inaccessible, resulting in a bad reputation and traffic loss.<\/p>

With this in mind, we will explain the possible causes of the ERR_QUIC_PROTOCOL_ERROR<\/strong> code and three effective methods to troubleshoot it.<\/p>

Download glossary for web beginners<\/a><\/p>

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What Is ERR_QUIC_PROTOCOL_ERROR?<\/h2>\n

The ERR_QUIC_PROTOCOL_ERROR is an error message indicating that a browser can’t connect to the target server via the QUIC. This error occurs for several reasons, including an incorrect server address, browser extensions, or an issue with the experimental QUIC protocol itself.<\/p>\n <\/div>\n\n\n\n

Error code<\/strong> <\/td>Connection refused<\/td><\/tr>
Error type<\/strong><\/td>Network communication protocol error<\/td><\/tr>
Error causes<\/strong><\/td>Network problem
Incorrect SSH installation
Wrong credentials
Security system configuration<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<\/p>

What Causes ERR_QUIC_PROTOCOL_ERROR<\/h2>

When trying to access a web page on Google Chrome, you might encounter ERR_QUIC_PROTOCOL_ERROR<\/strong>, causing the “This site can’t be reached” error message. The message indicates that your site may be temporarily down or moved permanently to a new web address.<\/p>

Enabled QUIC Protocol in Google Chrome<\/strong><\/p>

Google Chrome supports various protocols, including Quick UDP Internet Connections (QUIC)<\/strong>. It’s an experimental transport protocol that was designed to optimize web application delivery by reducing web latency.<\/p>

As it is built on top of the User Datagram Protocol (UDP)<\/strong> instead of Transport Layer Security (TCP)<\/strong>, it offers greater security protection and a faster browsing experience. This makes it ideal for gaming and streaming applications, where reliability and low latency are critical.<\/p>

While QUIC can provide significant performance benefits, the protocol is not as popular as HTTP or HTTPS<\/a>. As a result, the browser might refuse to load web pages due to compatibility issues.<\/p>

Important!<\/strong> QUIC typically refuse to work with unsafe HTTP sites, so to force HTTPS connections<\/a> to your site, make sure to get a valid SSL certificate from a Certificate Authority (CA)<\/strong>. At Hostinger<\/a>, all hosting plans come with free SSL certificates you can easily install via hPanel<\/strong>.<\/p><\/div>\n\n\n\n<\/p>

Chrome Browser Extensions<\/strong><\/p>

Essentially, a browser extension is a third-party software that can modify and improve the functionality of web browsers. While most extensions are beneficial, installing incompatible extensions may also trigger the error.<\/p>

Proxy Settings Issues in Windows<\/strong><\/p>

Another possible cause of the ERR_QUIC_PROTOCOL<\/strong> error is an issue with your proxy configuration. When using a proxy server, the web server will exclusively handle all the website requests. Thus, if the proxy server fails to forward the request properly, it may trigger the error.<\/p>

\"Hostinger<\/a><\/figure>

3 Ways to Fix ERR_QUIC_PROTOCOL_ERROR<\/h2>

Before getting into the troubleshooting methods, we recommend trying some quick fixes first. Here are some solutions to consider when encountering ERR_QUIC_PROTOCOL_ERROR<\/strong>:<\/p>