Socket Proxy Error in Talk

Hello,

I am getting a lot of these errors whenever visiting the Talk app:

Client error: POST https://vom-bruch.com/cloud/apps/richdocumentscode/proxy.php?filter=contentcontrol resulted in a 400 Bad Request response:

Socket proxy error

Error: The param should be 'status' or 'req=…', but is (truncated…)

I am using a native install with apache/php-fpm 8.3

I did add a “High performance Backend” docker container, but I dont think this is the issue, after disabling it again the error still shows. It was probably always there for me, but I rarely use the Talk app.

My NC install is in a subdirectory.

I can access documents though, they open up fine.

Just when visiting the talk app these errors pop up in the log.

I think the problem was OSC stapling in apache conf.

With

SSLUseStapling

removed it appears the error is gone.