How to fix: err_http2_protocol_error error in Google Chrome

How to fix: err_http2_protocol_error error in Google Chrome

The err_http2_protocol_error is a common issue faced by Google Chrome users, which can disrupt the browsing experience. Here are some steps to fix this error:

1. Refresh the Page: Sometimes, a simple page refresh can resolve the error. You can press F5 or click the refresh icon in your browser to try this.
2. Disable HTTP/2: Since this error is related to the HTTP/2 protocol, you can try disabling it. You can do this by going to chrome://flags/#enable-quic in the Chrome address bar, searching for "HTTP/2", and disabling it. After making changes, restart Chrome.
3. Clear Browser Cache and Cookies: Clearing your browser's cache and cookies can often resolve connectivity issues. Navigate to chrome://settings/clearBrowserData, select the time range, check "Cached images and files" and "Cookies and other site data", then click "Clear data".
4. Disable Browser Extensions: Some extensions may interfere with the HTTP/2 protocol. You can disable them one by one to identify if any specific extension is causing the issue. Go to chrome://extensions/, toggle off each extension, and restart Chrome to check if the error persists.
5. Update Google Chrome: Ensure that your Chrome browser is updated to the latest version, as newer versions often include bug fixes. You can check for updates in chrome://settings/help.
6. Check Website Server: Sometimes the issue may be on the server side. Contact the website's support team or try accessing the website on a different browser to see if the problem persists.
7. Reset Chrome Settings: If all else fails, resetting Chrome to its default settings can help. Navigate to chrome://settings/reset, and click on "Restore settings to their original defaults". This will reset your startup page, new tab page, search engine, and pinned tabs. It will also disable all extensions and clear temporary data like cookies, but it will not delete your bookmarks or saved passwords.

What are the common causes of the err_http2_protocol_error in Google Chrome?

The err_http2_protocol_error can be triggered by several factors. Understanding these can help in diagnosing and fixing the issue more effectively. Common causes include:

• Server-side Issues: The most common cause is a misconfiguration or an error on the web server. This could be due to outdated server software that does not fully support HTTP/2 or incorrect HTTP/2 configuration.
• Browser or Extension Issues: Sometimes, the problem lies with the browser itself or with extensions installed on Chrome. A browser bug or an extension that interferes with the HTTP/2 protocol can trigger this error.
• Network Problems: Network connectivity issues, including proxy settings, firewall rules, or intermittent connections, can also lead to HTTP/2 protocol errors.
• Cache and Cookies: Accumulated cache and cookies might cause conflicts with the HTTP/2 protocol, especially if they are outdated or corrupted.
• HTTP/2 Protocol Mismatch: If there is a mismatch between the HTTP/2 protocol support on the client and server sides, it can lead to this error.

Can clearing the browser cache resolve the err_http2_protocol_error issue in Google Chrome?

Yes, clearing the browser cache can indeed resolve the err_http2_protocol_error in many cases. The cache stores temporary data from websites you visit, including images, scripts, and other content. If this data becomes outdated or corrupted, it can cause conflicts with the HTTP/2 protocol.

To clear the cache in Google Chrome, follow these steps:

1. Go to chrome://settings/clearBrowserData.
2. Choose the time range for which you want to clear data. Selecting "All time" will clear everything.
3. Ensure that "Cached images and files" is checked. You may also want to check "Cookies and other site data" as clearing these can also help resolve issues.
4. Click on "Clear data".

After clearing the cache, restart Chrome and attempt to access the website again. If the error was caused by cached data, this should resolve the issue.

Are there any specific extensions that might trigger the err_http2_protocol_error in Google Chrome?

While no specific extensions are universally known to cause the err_http2_protocol_error, certain types of extensions may interfere with the HTTP/2 protocol, potentially leading to this error. Extensions that modify web content, manage network requests, or alter HTTP headers are particularly likely to be problematic. Examples include:

• Ad blockers: Extensions like AdBlock or uBlock Origin can sometimes interfere with the HTTP/2 protocol by modifying or blocking certain requests.
• Privacy and Security Extensions: Tools like HTTPS Everywhere or Privacy Badger might alter how Chrome handles HTTP/2 connections.
• Content Modification Extensions: Extensions that inject or modify content, such as script blockers or style managers, could disrupt the HTTP/2 protocol.
• Proxy and VPN Extensions: These extensions can change the way your browser communicates with web servers, which may lead to protocol errors.

To identify if an extension is causing the err_http2_protocol_error, you can disable them one by one and restart Chrome to see if the issue resolves. Navigate to chrome://extensions/, and toggle off each extension to test. If disabling a particular extension fixes the error, consider removing it or finding an alternative that does not cause this issue.

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