How do you fix the ERR_QUIC_PROTOCOL_ERROR?

[AngelineCr]

"I'm encountering an ERR_QUIC_PROTOCOL_ERROR when loading some websites. Has anyone dealt with this before? What fixes worked for you?"

 

[danisjohn]

You can fix the ERR_QUIC_PROTOCOL_ERROR by disabling the QUIC protocol in Chrome flags, clearing your browser cache, updating Chrome, or temporarily disabling VPN/firewall. Restart the browser afterward. If the issue persists, try resetting network settings or switching to a different DNS server to restore proper website connectivity.

 

[AnnisHayma]

To fix ERR_QUIC_PROTOCOL_ERROR, first clear your browser cache and cookies. Disable any VPN, proxy, or antivirus web shield that might block QUIC. In Chrome, turn off “Experimental QUIC protocol” in chrome://flags. Restart the browser or device. If the issue persists, reset network settings or try another network.

 

[ArthurMex]

ERR_QUIC_PROTOCOL_ERROR often appears when Chrome’s QUIC feature conflicts with network settings. Start by updating Chrome and restarting your router. Disable QUIC in chrome://flags, then turn off VPN, proxy, or firewall filters temporarily. Clear cache, flush DNS, and reset network adapters. Switching to a different Wi-Fi or mobile hotspot may also resolve it.

 

[ArthurMex]

Here’s how to fix the ERR_QUIC_PROTOCOL_ERROR in Chrome:

1. Disable QUIC Protocol:
   
   • Type chrome://flags/#enable-quic in the address bar.
   • Set Experimental QUIC Protocol to Disabled and restart the browser.
2. Clear Browser Data:
   
   • Go to Settings → Privacy and Security → Clear browsing data.
   • Clear cache and cookies.
3. Disable VPN or Proxy:
   
   • Turn off any VPN, proxy, or firewall temporarily and check the site.
4. Update Browser:
   
   • Make sure Chrome (or your browser) is updated to the latest version.
5. Check Internet Connection:
   
   • Restart your router or switch networks if possible.

These steps usually resolve the ERR_QUIC_PROTOCOL_ERROR.