Loading errors and files not showing up

Hi guys,
I am experiencing a weird error. I got my system running fine on an Ubuntu Server with docker-compose. After a restart i can’t access my files on my webpage. There are weird loading screens and my uploaded files are not listed. See the picture.

I ve tried multiple things and even created fresh folders starting with a new instance of nextcloud. Even there I see the same error… weird right? I have my nextcloud setup with a reverse proxy. Might that cause this error?

Okay found the error. It was in the reverse proxy setup. Sorry guys!