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Fix ERR_HTTP2_PROTOCOL_ERROR on Google Chrome Browser Issue



The ERR_HTTP2_PROTOCOL_ERROR is a common issue in Google Chrome that interrupts your web browsing by preventing pages from loading properly. This error can arise from various factors like outdated browser versions, corrupted data, or conflicts with browser extensions.

Fixing this Chrome error is crucial for a smooth and hassle-free internet experience, ensuring you can access websites without any unexpected disruptions.

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Understanding ERR_HTTP2_PROTOCOL_ERROR on Google Chrome Browser

Encountering ERR_HTTP2_PROTOCOL_ERROR on your browser can be perplexing and frustrating. This issue often stems from a few typical sources.

A common cause is a corrupted cache. The cache is where your browser stores bits of information from websites you’ve visited to load them faster in the future. When it gets corrupted, it can stop websites from loading correctly.

Another potential issue could be an outdated browser or operating system. Websites are constantly updating, and if your browser or OS is lagging behind, it might struggle to communicate effectively with these websites.

Browser extensions are fantastic tools that enhance your browsing experience, but sometimes, they don’t play well with certain websites. This conflict can prevent websites from loading as they should.

Your antivirus or firewall software is there to protect your computer, but occasionally, it can be a bit overprotective. This means it might block access to websites, mistaking them for threats, which leads to the ERR_HTTP2_PROTOCOL_ERROR.

Preliminary Steps Before Troubleshooting Google Chrome ERR_HTTP2_PROTOCOL_ERROR

Before diving into technical fixes, it’s a good idea to try some basic steps. Start by closing tabs you don’t need. Too many open tabs can slow down your browser, sometimes leading to errors.

Refreshing the problematic website might sound simple, but it can be effective. It gives your browser another chance to load the page correctly.

Keep your Google Chrome and Windows operating systems up to date. Updates often include fixes for common errors and compatibility issues.

Sometimes, your antivirus or firewall can be a bit overzealous, blocking websites it shouldn’t. Temporarily disabling these can help determine if they’re the cause of your troubles.

If you’re still facing issues, consider switching networks or using a VPN. This can bypass network-related problems that might be causing the error.

Top Solutions to Resolve ERR_HTTP2_PROTOCOL_ERROR on Google Chrome Browser

Open a Private or Incognito Browser Window on Google Chrome

Image credit: Google

Using Incognito mode in Google Chrome is a handy trick for troubleshooting. When you browse in Incognito mode, Chrome doesn’t save your browsing history, cookies, or site data.

This means you’re essentially starting with a clean slate, which can be useful for figuring out if the problem you’re experiencing is related to data stored by your browser.

  • To open Incognito mode in Chrome, it’s pretty straightforward.
  • Click the three dots in the upper right corner of the browser.
  • Then select “New incognito window.” A new window will open with a dark background and an icon of a hat and glasses, indicating you’re in Incognito mode.
  • Try accessing the problematic website in this window to see if the error persists. This can help you determine if the issue is with your regular browsing settings or extensions.

Clear Google Chrome Browsing Data

Clearing your browsing data in Google Chrome, like cache and cookies, can often resolve various browser issues. This process removes stored data that might be outdated or causing conflicts with websites.

To clear your browsing data in Chrome:

  • Open Google Chrome.
  • Click the three dots in the upper right corner.
  • Select “More tools” and then “Clear browsing data.”
  • Choose the time range you want to clear. For most issues, “All time” is a good choice.
  • Make sure to check the boxes for “Cookies and other site data” and “Cached images and files.”
  • Click “Clear data.”

After you’ve cleared the cache and cookies, the browser will have a fresh start, potentially resolving the ERR_HTTP2_PROTOCOL_ERROR. This can also improve the overall speed and responsiveness of your browser. You might need to sign in again on some websites after clearing this data.

Disable or Uninstall Google Chrome Browser Extensions

Browser extensions can be great tools, but sometimes they cause more trouble than they’re worth. If you’re facing issues like ERR_HTTP2_PROTOCOL_ERROR, it could be due to a conflicting extension.

  • To identify and disable these extensions, first, click on the three dots in the upper-right corner of Chrome.
  • Then, select “More tools” and click on “Extensions.” Here, you’ll see a list of all the extensions you’ve installed.
  • You can disable an extension by toggling the switch at the bottom-right corner of each extension box.
  • After disabling the extensions, revisit the website where you encountered the error.

If the website loads without issues, one of the extensions was likely the problem. You can then re-enable the extensions one by one to pinpoint the exact one causing the conflict. If you find the problematic extension, consider uninstalling it to avoid future issues.

Update Google Chrome Browser Version

Image credit: Google

Keeping your Google Chrome browser up to date is crucial. Updates often include important fixes that can resolve a variety of issues, including the ERR_HTTP2_PROTOCOL_ERROR.

To check if your Chrome browser is up to date:

  • Open Google Chrome.
  • Click the three dots in the upper-right corner.
  • Select “Help” and then “About Google Chrome.”
  • Chrome will automatically check for updates.
  • If an update is available, Chrome will start updating.

After the update is complete, relaunch Chrome.

Restore Google Chrome’s Default Settings

Restoring Google Chrome to its default settings is like giving it a fresh start. It’s a useful step when you’ve tried everything else and the ERR_HTTP2_PROTOCOL_ERROR still pops up.

This action resets everything in Chrome—like your homepage, tabs, and search engine preferences—back to what they were when you first installed it. It can also disable all extensions, which could be a relief if one of them is causing the problem.

  • To restore Chrome to its default settings, open the settings menu by clicking the three dots in the upper right corner.
  • Go to “Settings,” scroll down to “Advanced,” and look for “Restore settings to their original defaults.”
  • Click it and confirm your choice.

Don’t forget, this step will erase all your customized settings and extensions, so you’ll need to set them up again if needed. But it could be the key to getting Chrome back on track.

Disable the QUIC Protocol in Google Chrome Browser

Quick UDP Internet Connections (QUIC) is a network protocol developed by Google. It’s designed to speed up web browsing by making data transmission more efficient. However, sometimes QUIC can cause issues like ERR_HTTP2_PROTOCOL_ERROR due to incompatibilities with certain websites.

To disable QUIC in Chrome settings:

  • Open Google Chrome.
  • Type chrome://flags/#enable-quic in the address bar and press Enter.
  • Look for the setting named “Experimental QUIC protocol.”
  • Change its status to “Disabled” using the drop-down menu.
  • Restart Chrome for the changes to take effect.

Disabling QUIC can sometimes resolve the ERR_HTTP2_PROTOCOL_ERROR, allowing smoother access to websites.

Reinstall Google Chrome Browser

Image credit: Google

Sometimes, the best solution is to start from scratch, and that’s where reinstalling Google Chrome comes into play. If you’ve tried everything else and still face issues like ERR_HTTP2_PROTOCOL_ERROR, reinstalling Chrome can help.

This process removes the existing installation of Chrome and replaces it with a fresh copy. It’s like getting a brand new browser, free from any past errors or conflicts.

  • For uninstalling Chrome, first, close any open Chrome windows.
  • Then, depending on your operating system, go to your computer’s ‘Add or Remove Programs’ or ‘Applications’ section.
  • Find Google Chrome in the list, and select ‘Uninstall.’
  • Follow the prompts to remove the browser from your computer.
  • After uninstalling, install the latest version of Chrome from the official website.

This fresh installation might just solve the persistent issues you’re encountering.

Addressing ERR_HTTP2_PROTOCOL_ERROR in Google Chrome is a solvable challenge. The steps provided are intended to eliminate common causes of this issue systematically. By methodically applying these solutions, you stand a good chance of resolving the error and enjoying uninterrupted web browsing.



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