How to Fix the ERR_QUIC_PROTOCOL_ERROR in Chrome

There are a few different methods to fix the ERR_QUIC_PROTOCOL_ERROR, which we’ll demonstrate below:

  • Disable the QUIC Protocol in Chrome
  • Disable Chrome browser extensions
  • Check proxy settings in Windows

Solution 1: Disable the QUIC Protocol in Chrome

Because the error indicates a problem with the QUIC protocol, one solution is to simply disable the QUIC protocol in Chrome.

To do so, type chrome://flags/ into your Chrome browser address bar. Then, use the search box to search for “quic” to locate the protocol.

From there, use the drop-down to change from Default to Disabled:

How to disable QUIC protocol in Chrome

Once you’ve disabled the Experimental QUIC protocol, restart the Chrome browser to make the changes take effect.

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Solution 2: Disable Chrome Extensions

Sometimes, it could be an issue with one of your Chrome extensions that’s causing the error.

Unfortunately, there’s no way to diagnose the exact extension so the best approach is to disable all of your extensions and then re-enable them one-by-one to find the culprit.

If you only started seeing the ERR_QUIC_PROTOCOL_ERROR message after installing a new extension, you can try disabling that extension first.

To disable your Chrome extensions, you can enter chrome://extensions/ in your browser address bar:

How to disable Chrome browser extensions

Then, use the toggle to enable and disable extensions as needed.

Solution 3: Check Proxy Settings (Windows)

If you’re using Windows, you might have an issue with your proxy settings that’s causing the ERR_QUIC_PROTOCOL_ERROR message.

To get started, open your Settings area in Windows (hit the Windows key and then select the Settings gear).

Then, search for Internet Options and select the result:

How to access Internet Options in Windows

In the Internet Properties popup, go to the Connections tab. Then, select LAN settings:

How to access LAN settings

Make sure that the Use a proxy server for your LAN… setting is unchecked. Then, click OK and then Apply. You might also need to restart your computer:

Check the proxy settings

Summary

The ERR_QUIC_PROTOCOL_ERROR message is an error that’s specific to the Chrome Browser and its use of the Quick UDP Internet Connections (QUIC protocol).

It has nothing to do with your WordPress site itself, but it might prevent you from accessing your WordPress site.

To fix the issue, you can try:

  • Disabling the Experimental QUIC protocol in Chrome’s settings
  • Disabling your Chrome browser extensions
  • Changing your Windows proxy settings

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