How to fix
ERR_QUIC_PROTOCOL_ERROR on Google Chrome
on Windows

Hello, I feel frustrated over here! I’ve started receiving an error when browsing with Google Chrome. The error says Error code: ERR_QUIC_PROTOCOL_ERROR. I can’t browse on any Google-connected pages. It’s interesting that when I browser using Incognito Mode, the error does not occur. Could you please help me fix this error?

It is evident that Google Chrome is one of the most famous and widely used browsers around the world. Users highly value this software for its ability to support numerous useful extensions[ref en-1], features and easy-to-use design. It is worth to mention that none of other web browsers can provide such short latency[ref en-2] time as Chrome.

Despite the attempts to make Google Chrome the best, it is still impossible to avoid minor system bugs and glitches. Likewise, several people online have started questioning what is error ERR_QUIC_PROTOCOL_ERROR on Google Chrome? It has showed up quite a while ago. However, IT specialists are still working on the solution to fix it.

 Here is the full message of the error code:

This Webpage is Not Available
The webpage at “xxx” might be temporary down or it may have moved permanently to a new web address.
Error Code: ERR_QUIC_PROTOCOL_ERROR.

As the error code indicates, users who encounter such message are having problems with QUICK protocol[ref en-3] which was initially designed to speed up users' browsing experience. Sadly, as any other software, this one is not bug-resistant as well. Likewise, people who excessively use Gmail, Youtube or other Google applications can face this issue from time to time.

Unfortunately, but the actual cause of this connection error is unknown. It is assumed that it may be triggered by the misconfigured Google Chrome’s settings, some software conflict, connection problems, and similar issues. Luckily, it’s easier to fix ERR_QUIC_PROTOCOL_ERROR bug in a quite easy manner. For that, you have to perform the steps provided down below.

Three ways to fix ERR_QUIC_PROTOCOL_ERROR on Google Chrome

Since this QUIC protocol bug still remains a mystery for IT professionals, we have prepared a guide on how to fix ERR_QUIC_PROTOCOL_ERROR. Note that is consists of three different techniques which tries to alter settings in a way that the connection error would disappear. Likewise, we strongly advise you to try them all in order to successfully fix the bug. You will find guidelines just below.

Method 1. Disable Experimental QUIC protocol

1. Open Google Chrome;
2. In the address bar of the new tab window, type chrome://flags/ and press Enter.
   

   

   
   
3. Don’t get dismayed at a warning message that says Careful, these experiment may bite. Once you see it, click Ctrl + F simultaneously to open search box;
4. Type Experimental QUIC protocol in it and select Disable from the drop down menu.
   

   

5. Finally, reopen Google Chrome.

Method 2. Check Windows Firewall or Local Proxy Settings

• Go to Start -> Control Panel -> Internet Options;
• When a pop-up window shows up, click on the Connection and select LAN settings;
• If the are some problems with the connection, you will have to fix them in order to remove ERR_QUIC_PROTOCOL_ERROR error.

Method 3. Disable web browser extensions

• Open Google Chrome and click on the Menu (three horizontal lines at the right top corner);
• Select More Tools and click on the Extensions.
  

  

  
  
• Here you have to remove the ticks that are shown aside the apps;
• By removing the ticks, you will disable web browser’s extensions;
• After that, click on Remove and Disable the link given under the plug-in.
  

  

• Once you’re done, reopen Google Chrome.

Hopefully, these steps have helped you to get rid of ERR_QUIC_PROTOCOL_ERROR bug. Lastly, we would highly recommend you to install and run a full system scan with a professional optimization tool since that’s the only way to prevent system errors, slowdowns, malware infections, and similar issues. Our recommendation would be to use [d1].