I have a clean installation of HestiaCP on Ubuntu 22.04, using Nginx web server without Apache.
In the logs of more than 5 sites I see the same error, which was not observed on Ubuntu 20.04:
[error] 144649#144649: *10560 FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream
This error always comes back on a request whose file doesn’t exist on the server.
There is a discussion thread on this:
I found several discussions here on the forum, but no working solution. I’m sure the problem is insufficient configuration.