What is the ERR_QUIC_PROTOCOL_ERROR?
The ERR_QUIC_PROTOCOL_ERROR is an error that is specific to Chrome and it occurs when there is a problem with the QUIC (Quick UDP Internet Connections) protocol. QUIC is a Google chrome developed technology to enhance the speed and security of web browsing. However, when Chrome is not able to establish a proper connection with the help of QUIC, it throws this error that denies the user access to certain websites.
What are the Causes of ERR_QUIC_PROTOCOL_ERROR
Knowing the cause of this problem is the first step towards solving it. Following are the most common reasons why this error occurs:
- Using an Older Version of Chrome: Earlier versions of Chrome may not have a full QUIC protocol
- Network Configuration Issues: Incorrectly configured proxy settings or firewalls can pose a threat to the QUIC protocol.
- Incompatible Extensions: Some Chrome extensions may pose a conflict with the QUIC protocol.
- Cache or Cookie Corruption: Stale or damaged browser data can cause errors.
- Incompatibility of the QUIC Protocol: There may be some websites or networks that are incompatible with the QUIC
How to Fix the ERR_QUIC_PROTOCOL_ERROR in Chrome
If you’re wondering how to resolve this issue, try these five proven solutions:
- Disable the QUIC Protocol in Chrome
- Disable Chrome Extensions
- Check Proxy Settings in Windows
- Adjust Firewall Settings
- Clear Bad Cache or Cookies
Solution 1: Disable the QUIC Protocol in Chrome
Since the error is tied to the QUIC protocol, disabling it can often resolve the issue:
- Open Chrome and type chrome://flags in the address bar.
- Search for “QUIC” using the search bar.
- Find the Experimental QUIC protocol option and set it to Disabled.
- Restart Chrome and check if the error is resolved.
Solution 2: Disable Chrome Extensions
Conflicting extensions can sometimes cause this issue. To troubleshoot:
- Click the three-dot menu in Chrome and navigate to Extensions >> Manage Extensions.
- Disable all extensions by toggling them off.
- Restart Chrome and re-enable extensions one by one to identify the problematic one.
Solution 3: Check Proxy Settings in Windows
Incorrect proxy settings can interfere with the QUIC protocol.
Here’s how to fix this:
- Press Windows + I to open Settings.
- Go to Network & Internet > Proxy.
- Make sure the Automatically detect settings option is turned on.
- If manual proxy settings are enabled, disable them.
Solution 4: Adjust Firewall Settings
Firewall restrictions can block the QUIC protocol, leading to this error.
To adjust your firewall:
- Open Windows Defender Firewall from the Control Panel.
- Click on Allow an app or feature through Windows Defender Firewall.
- Ensure Chrome is allowed through both private and public networks.
Solution 5: Clear Bad Cache or Cookies
Corrupted cache or cookies can trigger this issue.
To clear them:
- Open Chrome and press Ctrl + Shift + Delete.
- Select Cached images and files and Cookies and other site data.
- Click Clear data and restart Chrome.
ERR_QUIC_PROTOCOL_ERROR FAQs
What Are Some Common ERR_QUIC_PROTOCOL_ERROR Messages?
- “ERR_QUIC_PROTOCOL_ERROR: Connection failed.”
- “Unable to establish a secure connection due to QUIC protocol error.”
What Can I Do to Prevent ERR_QUIC_PROTOCOL_ERROR?
- Keep Chrome updated to the latest version.
- Regularly clear cache and cookies.
- Avoid using outdated or conflicting extensions.
How Do I Know if I Have an ERR_QUIC_PROTOCOL_ERROR?
You’ll see an error message in Chrome stating “ERR_QUIC_PROTOCOL_ERROR” when trying to access a website. The page will fail to load, and the error code will be displayed on the screen.
