The HTTP protocol is broken down by HTTP/2 into an exchange of binary-encoded frames, which are then translated into messages specific to a given stream and multiplexed within a single TCP connection. Many users have reported ERR_HTTP2_PROTOCOL_ERROR Chrome. In this guide, we will tell you its causes and how to troubleshoot it. So, please keep reading to learn about it.

How to Fix ERR_HTTP2_PROTOCOL_ERROR in Google Chrome

The concerned problem occurs when a client tries to browse a website but is unsuccessful. Let us discuss the possible reasons for ERR_HTTP2_PROTOCOL_ERROR:

• Temporary glitches.
• Corrupt user profile.
• Problematic extension.
• The date and time on your device are incorrect.
• Corrupted cache.
• An outdated browser.
• An outdated software.
• Antivirus software.

Method 1: Basic Troubleshooting Methods

Try the below-mentioned basic troubleshooting methods to fix ERR_HTTP2_PROTOCOL_ERROR:

1A. Refresh Webpage

The easiest and most effective approach to resolve the discussed error code is refreshing the webpage. Refreshing a webpage can resolve temporary glitches. You can use any of the two options mentioned below to refresh the webpage:

Option I: Using One Key

1. Hit the F5 key on your keyboard.

Option II: Using Two Keys

1. Press Ctrl + R keys together to refresh a webpage.

If the error remains, use the following methods to troubleshoot the concerned error.

1B. Close Other Tabs

The next possible method to resolve the discussed problem is closing all the tabs you are not using. We suggest you to close tabs because if there are too many open tabs, the new website cannot load properly. To close other tabs, click on the cross icon.

1C. Restart Google Chrome

You can restart the discussed browser, as restarting the search engine can fix minor browser bugs. To restart a browser, use task manager End Task option. You can also use our guide on How to End Tasks in Windows 10. If the discussed method could not fix the issue, perform the following method.

1D. Use Incognito Mode

The discussed issue can also occur because of the corrupted cache, cookies and browser history. Therefore, you should use incognito mode. Also, installed extension can also be another culprit for the problem. So you should be in incognito mode to resolve the issue that is caused due to problematic extension. We have provided a guide on how to enable Incognito mode in Chrome that will guide you on how to use incognito mode.

1E. Create New Profile

ERR_HTTP2_PROTOCOL_ERROR Chrome could occur if your current Google Chrome user profile is corrupt. A corrupt user profile could generate damaged data packet headers on your PC that might not be correctly interpreted on the server side. So, you should create a new profile. The steps to create a new profile are given below:

1. Open Google Chrome on your PC.

2. Next, navigate to the user icon on the screen’s right side.

3. Click on + Add.

4. Next, select Continue without an account.

5. After that, type the name of the new profile and click on Done.

1F. Disable or Remove Chrome Extension

Computer programs called extensions enable users to customize the browsing experience. Website-building tools like HTML, CSS, and JavaScript are used to create extensions. These add-ons increase user productivity. However, it can result in the discussed problem. Hence, you can disable or remove the problematic extensions to resolve the discussed issue. The steps that will teach you how to disable or remove extensions are given below:

Option I: Disable Extensions

1. First, navigate to three dots located at the right corner of the Chrome page.

2. From the drop-down menu, click on More tools.

3. From the context menu, click on Extensions.

4. Disable all the extensions by clicking on the toggle–off button.

Option II: Remove Google Chrome Extension

1. Click on the three dots located at the right corner of the Chrome page.

2. Now, click on More tools.

3. From the context menu, click on Extensions.

4. After that, click on the Remove button for that extension.

5. Finally, select Remove.

1G. Disable QUIC Protocol

QUIC (Quick UDP Internet Connections) is a new transport protocol for the internet developed by Google. If the website you want to open on the search engine is not configured correctly to handle traffic from the experimental Quick UDP Internet Connections transport layer network, the discussed problem can occur. You can resolve the issue by disabling the QUIC protocol.

1. Open Chrome on your PC.

2. In the address bar, type chrome://flags/#enable-quic and hit the Enter key.

3. Under Experimental QUIC protocol, click on the drop-down arrow.

4. Click on Disabled.

1H. Set Correct Date and Time

The host might reject data packets with the incorrect time stamp. So, set the correct date and time on your computer. Use the below-mentioned steps to set the correct date and time on your PC to fix ERR_HTTP2_PROTOCOL_ERROR issue.

1. Press Windows + I keys together to open Settings on your PC.

2. Next, choose Time & Language.

3. After that, select the Date & time tab.

4. Now, toggle on Set time automatically.

5. Here, toggle on Set time zone automatically.

6. Next, scroll down and select Sync now button.

1I. Use VPN

If you are not using VPN on your device, try using a VPN. To turn on VPN, use the steps given below:

Note: The below-mentioned steps were performed on NordVPN.

1. First, hit the Windows key.

2. Now, type NordVPN in the search box and click on Open.

3. Next, select any other regional server and try to open the webpage again.

1J. Disable VPN and Proxy

Turn off VPN and proxy on your computer to resolve ERR_HTTP2_PROTOCOL_ERROR Chrome. Use our guide to learn How to Disable VPN and Proxy on Windows 10. If this method has not helped you, move to the next method.

Also Read: Fix Err Proxy Connection Failed Chrome Error

Method 2: Clear Cookies and Cache

The cache on the browser may get corrupted. So, you should clear the cookies and cache on the discussed browser to fix ERR_HTTP2_PROTOCOL_ERROR Chrome. Follow our full guide on how to clear cache and cookies in Chrome.

Method 3: Update Google Chrome

If the search engine you are using is not up to date, the website may actively reject the client request owing to the incompatible data packets. So, you should update the concerned web browser. To learn how to update the discussed search engine, refer to the steps that are mentioned below:

1. Hit the Windows key, type Google Chrome in the search box and click on Open.

2. After that, select three dots.

3. Click on Settings.

4. After that, click on About Chrome.

5A. If an update is there, the discussed browser will get updated automatically. When it gets updated, click on the Relaunch button.

5B. Under Google Chrome, you will see Chrome is up to date if the browser is updated. So, move to the following method.

Method 4: Update Windows

The next possible method to fix ERR_HTTP2_PROTOCOL_ERROR Chrome is to update Windows software. An outdated operating system can create incompatible data packets on the server or websites. Moreover, your device runs slow when it is outdated. So, we suggest you to update your device. You can use our guide to learn how to download and install Windows 11 updates.

Also Read: 13 Ways to Fix Twitter Not Loading on Chrome

Method 5: Reset Chrome

Changes you make to the browser for a customized experience can create trouble while browsing the internet. Therefore, use the steps to reset the concerned engine:

1. Hit the Windows key, type Google Chrome, and select Open.

2. After that, click on three dots.

3. Next, click on Settings.

4. Here, select Reset and clean up.

5. Under Reset and clean up, choose Restore settings to their original defaults.

6. Choose Reset settings.

Method 6: Reinstall Browser

If updating the Windows and resetting the browser have failed to resolve ERR_HTTP2_PROTOCOL_ERROR, try reinstalling the discussed search engine. When you reinstall the browser, the installed browser will be up to date. To reinstall the browser, uninstall it and then download it from the official website. Use the steps and link mentioned below to uninstall and download, respectively:

1. Open Settings by pressing Windows + I keys simultaneously.

2. From the left pane, choose Apps.

3. Next, click on Installed apps.

4. Click on the three dots located in front of Google Chrome.

5. From the context menu, click on Uninstall.

6. Next, select Uninstall.

7. After that, press the Windows + R keys to open the Run dialog box.

8. Now, type %localappdata% in the box and press the Enter key.

9. After that, double-click on the Google folder to open it.

10. Right-click on the Chrome folder, and from the context menu, click on Delete.

11. Press the Windows + R keys together to open the Run dialog box on your device.

12. Type %appdata% in the Run dialog box and click on OK

13. Next, repeat steps 9 to 10 of this method.

14. Now, restart the PC.

15. After that, open the in-built browser on your PC. Then, use the official Chrome site to download the search engine on your computer.

16. Select Download Chrome.

17. Run the setup file and proceed as per the on-screen instructions.

Also Read: Fix Google Chrome Server Sent No Data Error

Method 7: Uninstall Conflicting Updates

If the discussed ERR_HTTP2_PROTOCOL_ERROR has occurred after you installed operating system updates, uninstall the updates. Read the steps mentioned below to uninstall updates:

1. Press Windows + I keys simultaneously to open Settings on your computer.

2. Click on the Windows update tab.

3. Now, Update History.

4. Click on Uninstall updates.

5. After that, uninstall the latest update by clicking on Uninstall.

6. Now, click on Uninstall.

7. Reboot the PC and see if the issue is resolved.

Also Read: Top 10 Ways to Fix Google Chrome Keeps Crashing on Android

Method 8: Disable Antivirus Temporarily (Not Recommended)

A software tool called an antivirus is used to stop, find, and eliminate viruses and malware. It functions on all gadgets, including laptops, smartphones, tablets, and desktop PCs. An antivirus typically runs in the background and can interfere with the communication between your device and the website you want to open. To learn How to Disable Antivirus Temporarily on Windows 10 read our guide.

Method 9: Switch to Another Browser

If the methods mentioned above have not helped you, try another browser. Here is a list of some of the most widely used browsers.

Recommended:

We hope this article was helpful and you were able to fix ERR_HTTP2_PROTOCOL_ERROR Chrome. If you still have questions, please ask them in the comment section below. Also, let us know what you want to learn next.