Sometimes, Users may face some unexpected errors while browsing specific webpages using Chrome. The ERR_QUIC_PROTOCOL_ERROR is one of them. But, There are some methods you can follow to fix this problem.

In fact, This error doesn’t only appear on Chrome, it also may appear in some chromium based browsers too. However, The solution is pretty much similar. This error appears when there is a problem in the QUIC protocol. It can be from your side or from Google itself. When users encounter this problem, they see the following message.

This site can’t be reached, The webpage at [website URL] might be temporarily down or it may have moved permanently to a new web address, ERR_QUIC_PROTOCOL_ERROR

The QUIC is a protocol developed by Google. The full form is Quick UDP Internet Connections. The main goal of it is to optimize the connection and provide security protection equivalent to TLS/SSL. Google engineers have made an experimental implementation in Chrome. As it is experimental, it may not work perfectly sometimes. As a result, Users may encounter face related errors.


There may be many things that affect the QUIC protocol. Whatever it is, these methods should solve your problem.

1. Disable Experimental QUIC Protocol [Quick Solution]

If you need a quick solution, this one is to try. Disabling this feature will fix err quic protocol error. But, You should also try other methods before trying this one if you are not in hurry. Because disabling QUIC protocol may solve your problem. But, You will miss its benefits. However, To disable this experimental protocol follow these instructions.

Disable Experimental QUIC Protocol in Google Chrome
  • At first, Type chrome://flags/ in the address bar of Google Chrome. It will open a page where you will find all the experimental features of Chrome.
  • Now, Type “QUIC” in the search box and press enter. You will find the Experimental QUIC Protocol.
  • Then, Click on the default and choose disabled.
  • At last, Restart chrome.

It should fix ERR_QUIC_PROTOCOL_ERROR. So, From now, you should no longer encounter that error while visiting any web pages.

2. Disable Extensions

One of the main reasons we use chrome is its extensions. Many third-party developers have developed different types of useful browser extensions for chrome that we find in the web store. But, Sometimes, A third-party browser add-on may affect your whole browsing experience. It is very possible that the ERR QUIC Protocol Error you are encountering because of an extension. So, To solve this problem, you should disable all the extensions and see what happens. Then, If it fixes your problem, enable the extensions one by one and find out which one was causing the problem. To disable extensions, follow these steps.

  • At first, Type chrome://extensions/ in the chrome address bar and hit enter.
  • Now, You can disable/enable them one by one by toggling the switches next to the extensions.

Disabling extensions help to get rid of Chrome’s problem on various operating systems. For example, it also helps if you encounter Chrome crashing problem on Mac.

3. Disable Proxy/VPN

If you have a proxy or VPN, disable it. It may fix your problem. To do it, follow these instructions.

  • At first, Press Win + I on the keyboard to open Windows 10 settings.
  • Now, Go to Network & Internet > Proxy.
  • Then, Disable everything there.

Now, Restart your PC and see if it has fixed the problem or not.

4. Disable Third-Party Antivirus and Firewall

Who knows if you have been facing this chrome error due to the security program installed on your PC? It may happen. So, To fix ERR_QUIC_PROTOCOL_ERROR, you can uninstall your antivirus and firewall temporarily.

These are the most effective methods to resolve your problem. If you have any necessary information or question, you can comment below.

Previous articleiTools Review – An iPhone Manager by ThinkSky
Next articleHow to Fix Unexpected Kernel Mode Trap on Windows 10
Hasibul Kabir is the founder of TechClassy. He is a Tech Blogger, Web Developer & Hobbyist Game Developer. He loves to write on technology, mainly Windows, macOS, iOS, etc.


Please enter your comment!
Please enter your name here