Error on update plugins - HTTP/2 stream 0 was not closed

Support
1

I’ve performed a fresh installation of wpmain and connected a site to test the tool. However, I’m unable to update the plugins on the connected site. I’m encountering the following error:
HTTP/2 stream 0 was not closed. INTERNAL_ERROR (err 2)

I’ve already tried the solution presented in: Same as: Connection test failed. HTTP/2 stream 0 was not closed cleanly
But it returned another error: HTTP error! transfer closed with outstanding read data remaining

The server has http 2.0. and both sites are running on the same server.

Got any suggestions?

2

Hey @propagare

Welcome to the MainWP community!

In some of the previous reports of this issue, the cause was either expired certificates or the improper Cloudflare configuration.
​
​Can you verify that the Dashboard and Child sites in question have valid certificates?
You can use a third-party tool such as SSL Checker to check certificates.

​And are you using Cloudflare for either?

3

Thanks

The certificates are valid. I checked with SSL Checker

We use Cloudflare for both sites

4

Can you temporarily pause Cloudflare on both sites so we can eliminate that as the potential cause?

If it does help, try whitelisting the Dashboard as explained in this document: Troubleshoot connection problems - MainWP Knowledgebase

5

It worked, but I needed one more step.

Needed to disable cloudflare proxy

Thank you very much

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