How to Resolve ERR_HTTP2_PROTOCOL_ERROR in Google Chrome

Step 1: Close Unneeded Tabs

Minimize the number of open tabs to enhance browser performance and reduce potential conflicts.

Step 2: Refresh the Website

A simple refresh may resolve temporary issues with the site loading. Give your browser another attempt to retrieve the page.

Step 3: Update Chrome and Operating System

Ensure that both your Google Chrome and operating system are running the latest versions to avoid compatibility issues.

Step 4: Temporarily Disable Antivirus or Firewall

See if your antivirus is blocking access by disabling it momentarily to check if that eliminates the issue.

Step 5: Change Your Network or Use a VPN

If possible, switch to another network or try a VPN to eliminate potential network-related problems.

Step 1: Open a Private or Incognito Browser Window

Launching Chrome in Incognito mode allows you to determine if the problem is linked to your stored data.

• Click the three dots in the upper-right corner of Chrome.
• Select “New Incognito Window.” A fresh window will launch.
• Attempt to access the troubled website in this new window to test if the error continues.

Pro Tip: Incognito mode does not save your browsing history, giving you a fresh start.

Step 2: Clear Your Google Chrome Browsing Data

Clearing stored browsing data, such as cookies and cache, can potentially resolve many conflicts.

• Open Chrome and click on the three dots in the top-right corner.
• Select “More tools” then “Clear browsing data.”
• Choose the desired time range — “All time” is recommended for comprehensive cleaning.
• Check the “Cookies and other site data” and “Cached images and files” options.
• Click “Clear data” to finalize the process.

Pro Tip: After clearing data, you may need to log back into websites.

Step 3: Disable or Uninstall Browser Extensions

Certain browser extensions may conflict with website loading. Here’s how to identify the culprit:

• Go to the three dots in the top-right corner of Chrome.
• Click “More tools, ” then select “Extensions.”
• Disable the extensions by toggling off the switches.
• Check the problematic website again to see if the error persists.

Pro Tip: Re-enable extensions one at a time to identify the conflicting one.

Step 4: Update Your Google Chrome Browser Version

Keeping your Chrome browser updated ensures that you benefit from the latest fixes and functionalities.

• Open Chrome and click on the three dots.
• Select “Help, ” then “About Google Chrome.”
• Chrome will check for updates automatically; install any available updates.

Pro Tip: Restart Chrome after updating to ensure everything is applied correctly.

Step 5: Restore Google Chrome’s Default Settings

Resetting Chrome to its default settings can eradicate issues caused by changed configurations:

• Open the settings menu by clicking the three dots.
• Scroll to “Advanced, ” and select “Restore settings to their original defaults.”
• Confirm your choice to reset.

Pro Tip: Remember that this resets all settings, so you’ll need to reconfigure them afterward.

Step 6: Disable the QUIC Protocol

Disabling the QUIC protocol can help resolve communication issues between your browser and websites:

• Open Chrome and enter chrome://flags/#enable-quic in the address bar.
• Locate “Experimental QUIC protocol” and set it to “Disabled.”
• Restart Chrome to apply changes.

Step 7: Reinstall Google Chrome

If all else fails, reinstalling Chrome can provide a fresh start:

• Close Chrome completely.
• Go to your computer’s uninstall programs section.
• Select Google Chrome, then click ‘Uninstall.’
• Download the latest version from the official Google Chrome site and reinstall it.

Pro Tip: Consider backing up your bookmarks and settings before uninstalling.

What causes ERR_HTTP2_PROTOCOL_ERROR?

How can I prevent ERR_HTTP2_PROTOCOL_ERROR from happening again?