How to fix “ERR_HTTP2_PROTOCOL_ERROR” in Moodle? Read the article to find out. As part of our Server Management Service, Bobcares provides answers to all of your Moodle questions.

Fixing “ERR_HTTP2_PROTOCOL_ERROR” in Moodle

Web browsers frequently display the “ERR_HTTP2_PROTOCOL_ERROR” warning message when we attempt to access a website using the HTTP/2 protocol, such as Moodle. In comparison to HTTP/1.1, HTTP/2 is a newer protocol for sending data over the internet which is quicker and more effective. However, problems can occur with any device. The best way to fix the issue in the context of Moodle is as follows:

Troubleshooting Steps

1. The error can occasionally because of browser-specific problems. To see if the issue still exists, try using a different web browser to access Moodle. If the issue just affects a single browser, browser extensions or settings may be to blame.

2. The browser’s cached data or damaged cookies can cause protocol issues. Access once more after clearing the cache and cookies in the browser.

3. Make sure the browser is current. In certain cases, we can solve compatibility problems by updating the browser to the most recent version.

4. In rare cases, protocol failures occur from bad or unreliable network connections. If the problem still occurs, check the internet connection and try using a different network to access Moodle.

5. The possibility that the error is server-side suggests that Moodle’s server settings may be problematic. This may be due to the server’s setup for HTTP/2. In order to look into the server setup in this situation, we need to contact Moodle hosting company or server admin.

6. Make sure the Moodle installation is set up properly. Ensure that it has been upgraded to the most recent version and that all server requirements, including HTTP/2 support, are met for Moodle to function.

7. Network proxies and firewalls occasionally cause issues with the HTTP/2 protocol. Such security measures might need to be changed if we’re using a network to visit Moodle in order to enable proper HTTP/2 communication.

8. Look through the server’s error logs for any particular messages referencing the error. We can find more details on what might be causing the problem in these logs.

9. If we are using a CDN to provide the content, then, see whether there are any settings or HTTP/2 compatibility difficulties.

10. It’s possible that some Moodle plugins and themes won’t support HTTP/2 completely. To see if they are the source of the error, try upgrading or disabling them.

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Conclusion

The article offers 10 troubleshooting tips from our Tech team for fixing the “ERR_HTTP2_PROTOCOL_ERROR” in Moodle.