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ERR_HTTP2_PROTOCOL_ERROR: Meaning & How to Fix It

Corrupt browser data will likely prompt this error

5 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

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Key notes

The HTTP2 network protocol allows users to access websites faster. It was developed to replace HTTP. However, the protocol sometimes displays the err_http2_protocol_error.

The issue is pretty standard and affects a lot of Windows users. If you’re currently experiencing the err_http2_protocol error, this article will provide steps to resolve it.

What is ERR_HTTP2_PROTOCOL_ERROR?

The err_http2_protocol error occurs when a user attempts to visit a website, but the web request is unsuccessful, which then displays the HTTP2 error code.

The error can be attributed to a string of issues reported in all famous browsers like Chrome or Firefox.

Unlike most browser errors, the err_http2_protocol error is known to occur on both the client and server sides and is also found in different operating systems like Windows, Linux, Mac, etc.

What causes ERR_HTTP2_PROTOCOL_ERROR?

The following are some of the most common causes of the err_http2_protocol error:

In order to solve this issue in a clever way, we advise you to consider a sleek browser such as Opera.

With its enhanced navigation and stability, every user can surf the web without any HTTPS errors or privacy issues due to its enhanced security or VPN protection.

Opera

How can I fix the ERR_HTTP2_PROTOCOL_ERROR?

Before we proceed with more advanced solutions, here are a couple of quick fixes you can attempt:

If the error persists after attempting the above fixes, here are advanced troubleshooting techniques you can try:

1. Update your Browser to the Latest Version

2. Run Windows Update

Updating your PC is a sure way to troubleshoot any issues affecting the apps on it.

3. Set the correct Date and time

If the device’s date and time are not correct, you could trigger a series of browser errors like the err_http2_protocol error.

This is because wrongly time-stampeddata packetsmay be refused by the host and thus trigger the issue. To prevent this, you’ll need to correctly adjust the date and time on your device.

4. Uninstall browser Extensions

Extensions are very useful tools that serve a unique purpose depending on the extension type. However, certain third-party extensions can conflict with the regular operations of Windows. In such cases, you’ll need to uninstall such extensions.

If you’d like to improve your Chrome privacy, here arethe best security and privacy extensions for Chrome.

5. Flush your DNS

If your DNS server is not responding, here is a detailed guide showing youhow to fix DNS Server not responding in Windows.

The err_http2_protocol error is a common browser error that prevents users from accessing specific websites.

Should you’ve got alternative solutions that helped you resolve the error, let us know in the comments below.

ERR_HTTP2_PROTOCOL_ERROR: Meaning & How to Fix It#

What is ERR_HTTP2_PROTOCOL_ERROR?#

What causes ERR_HTTP2_PROTOCOL_ERROR?#

Opera#

How can I fix the ERR_HTTP2_PROTOCOL_ERROR?#

1. Update your Browser to the Latest Version#

2. Run Windows Update#

3. Set the correct Date and time#

4. Uninstall browser Extensions#

5. Flush your DNS#