Fix: “Err_quic_protocol_error” Issue in Chrome Browser

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Here’s how to fix “Err_quic_protocol_error” Issue in Chrome Browser. Chrome is the most popular web browser in the world. It is usually a stable and reliable app. But it can have problems, and the error messages it shows aren’t always easy to understand. One of these is ERR QUIC PROTOCOL ERROR, which can happen when the Google QUIC transport protocol is used to get to a website.

Among these are many pages that Google owns. Google Chrome has to be one of the most reliable browsers out there. It has been around for a long time, and it is made by a company that wants you to be able to surf the web quickly and safely. Even though Firefox Quantum is faster and has more features, millions of people still use Chrome and it is still the base for other browsers that use Chromium.

Fix “Err_quic_protocol_error” Issue in Chrome Browser

Disable Firewall

Windows Firewall does a good job of stopping attacks from the outside, but it may also stop you from getting to some websites. It’s a good idea to quickly turn off Windows Firewall and see if you can still get to websites that are blocked. Do these things:

• Search for ‘windows firewall’ in the search field and click on Windows Firewall in the result.
• Click on ‘Turn Windows Firewall on or off’.
• Disable Windows firewall for both public and private networks.
• Open Google Chrome and access blocked websites. If you still can’t access these websites, re-enable Windows Firewall.

Like Windows, Mac has a firewall that can be turned off in the same way:

• Click on the Apple icon on top left corner of on your Mac and go to “System Preferences…”.
• Go to “Security & Privacy” option and then to “Firewall” tab.
• Click on the lock button showing “Click the lock to make changes.”
• Enter your administrator password and click on the “Unlock” button.
• Now click on the “Turn Off Firewall” button to disable the firewall.

Clear Browsing History

If you’ve been using the Internet a lot for years, you might have a lot of cache, history, and cookie files. When Chrome’s cache builds up, it can cause problems and slow down the way Chrome works as a whole. Use these steps to clear your cache.

• Open Chrome and press “Control + Shift + Delete” buttons in Windows and “Command + Shift + Delete” buttons in Mac.
• A new page with ‘chrome://settings/clearBrowserData’ in the address bar will open with a dialog box opened.
• Check the options ‘Cached images and files’, ’Cookies and other site data’, ‘Browsing history’ and ‘Download history’
• For the Time Range dropdown menu, choose All Time.
• Click on the blue Clear Data button.

Disable Experimental QUIC Protocol in Chrome

If you see the ERR QUIC PROTOCOL ERROR message, you might not be able to get to some websites. The best thing to do is turn off the experimental QUIC protocol. Open the Chrome web browser, type “chrome:/flags/” in the address bar, and press “Enter.” A page with the message WARNING: EXPERIMENTAL FEATURES AHEAD will be shown.

Use the search field and type “Experimental QUIC protocol” into it. You can find the entry for Experimental QUIC protocol and set the option to “Disabled.” Start the web browser over and make sure the problem is gone. Most of the time, turning off the protocol could fix the problem.

Disable Chrome Extensions

Extensions are very useful, and they let you add new features that Google didn’t have at first. But some extensions aren’t well made, and others could add bugs that make it hard for you to browse. It can be hard and take some time to find Chrome extensions that cause problems. Do these things:

• Open Chrome web browser and go to the URL “chrome://extensions/”.
• You will see all installed extensions. Each extension has an option enable or disable.
• If you think that an extension may cause the problem, switch off the extension.
• Restart Chrome and verify that the problem has been resolved

Reset Chrome

If none of the steps, like turning off the QUIC protocol and clearing the cache, work, nothing will. Then you need to choose a step that is a bit more extreme. If you try to reset the browser, you might be able to fix the problem. Do these things:

• Click on the three vertical dots icon located at the top right corner of your browser.
• Click on Settings. On the new page, scroll down until you find “Advanced”. Click on it to expand advanced options.
• Scroll down again and you should find ‘Reset’ at the bottom of the page. A pop up will warn you that all extension and temporary data will be removed.
• Click on Reset and restart Chrome web browser.