How to Fix ERR_QUIC_PROTOCOL_ERROR

Monday, 8 March 2021 (11 months ago)

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After discussing How to Fix Error 0x8007007e this time the admin will discuss How to Fix ERR_QUIC_PROTOCOL_ERROR. QUIC (Quick UDP Internet Connections) is an experimental network protocol, whose main purpose is to provide security protection that is equivalent to TLS / SSL, but faster.

It is designed not only to speed up the user’s browsing experience but also to improve the graphics of online games. The main features of QUIC are reduced connection time, improved congestion control, forward error correction, and connection migration.

You may receive the message “ERR_QUIC_PROTOCOL_ERROR” when trying to access certain websites. This error usually occurs when trying to open a web page that is integrated with Google (such as Gmail or YouTube), but it is possible that it occurs when trying to access other websites.

As previously mentioned, QUIC is an experimental protocol – this feature is still being tested and may not be stable. Therefore it is natural that “ERR_QUIC_PROTOCOL_ERROR” sometimes occurs. This error prevents the user from visiting the website and states that the target site cannot be reached.

To fix the error, you may need to check if QUIC is enabled in the Google Chrome browser. Another cause for this error is installing third-party extensions.

How to Fix ERR_QUIC_PROTOCOL_ERROR

Method 1: Disable QUIC Protocol

The easiest way to fix this “ERR_QUIC_PROTOCOL_ERROR” error is to disable the QUIC protocol itself. Open the Google Chrome browser, type chrome: // flags in the address bar, then press Enter. Scroll down to find “Experimental QUIC Protocol” and set it to “Disabled”. After that, restart Google Chrome and try visiting the website that was problematic again

Method 2: Disable Or Remove Third-Party Extensions

If disabling the QUIC protocol doesn’t fix the error, try to disable or remove any unknown third-party extensions in Google Chrome. Extensions are programs that allow users to customize their browsing experience.

It is possible that some installed extensions (possibly unknown or designed to block ads, pages, etc.) are preventing you from visiting certain websites and causing the error “ERR_QUIC_PROTOCOL_ERROR”.

To access installed extensions, type ” chrome: // extensions ” into the Chrome address bar and press Enter. You will see all the installed extensions. Please remove or deactivate the extension. Then restart Google Chrome.

Method 3: Temporarily Disable Firewall

A firewall is a security system that is responsible for monitoring and controlling incoming and outgoing network traffic. The system has built a barrier (wall or firewall) between the trusted internal network and the untrusted external network.

Firewalls filter network traffic and reduce the risk of being exposed to malicious software that can impact the security of private networks. If you are using third party antivirus software, go to settings and disable the firewall. If you are not using third-party antivirus software, type “firewall” into Windows Search and select the “Check firewall status” result. In the Windows Defender Firewall window, find the “Enable or disable Windows Defender Firewall” option and click it.

Select the “Disable Windows Defender Firewall (not recommended)” option under the type of network you are using (private or public) and click “OK”. Restart Google Chrome. If this doesn’t fix the problem, it’s best to restart the firewall.

That’s the article about How to Fix ERR_QUIC_PROTOCOL_ERROR. Hope it is useful.

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