Web Gui is not reachabel

Ich habe ein Problem.

Nachdem ich heute ein kleines Problem hatte, wurden ein paar Dateien von OVM gelöscht. - Denke ich zumindest -. Alles funktioniert auch noch ( Das NAS ), aber das Web-GUI funktioniert nicht mehr

502 Bad Gateway

nginx

Ich habe schon versucht Openmedivault neu zu installieren via apt-get install --reinstall openmediavault.

PHP: 8.0.5

Apache2 Server am laufen (neu)

Rasp 3

Das ist der Fehler-Code in der openmediavault-webgui_error.log:

Siehe Unten:

//////////////////////////////////////////////////////////////////////////////

I have a problem.

After I had a little problem today, a few files were deleted by OVM. - At least I think so -. Everything still works too ( The NAS ), but the web GUI doesn't work anymore

502 Bad Gateway

nginx

I already tried to reinstall openmedivault via apt-get install --reinstall openmediavault.

PHP: 8.0.5

Apache2 server running (new)

Rasp 3

This is the error code in the openmediavault-webgui_error.log:

See Below:

2021/05/21 13:37:48 [crit] 4697#4697: *1 connect() to unix:/run/php/php7.3-fpm-openmediavault-webgui.sock failed (2: No such file or directory) while connecting to upstream, client: ::ffff:192.168.178.100, server: openmediavault-webgui, request: "GE$

Yeah, I know. But I have read in many forums that it could have something to do with the Apache2 server, because I have set it up today I wrote it down. Because of that, I have then also installed php8.0. Since then nothing works.
I only get "502 Bad Gateway" when I call the domain of OMV