Webpage does not load over reverse Proxy

[hlarc]

OS Name/Version:
Ubuntu 22.04.4

Product Name/Version: (Always use the full version number - not ‘Latest’)
AMP Instance Manager v2.5.1.2 built 24/07/2024 21:33

Problem Description:
I cannot access the admin Page on my reverse Proxy. I have it on amp.domain.tld. It will load for a second some of the UI Items wich then will be gone. I checked in the dev tools if the reverse Proxy may be malfunctioning but all requests get 200 Status Codes. The Webinterface is available on Port 8080 but only with http. I did not use the Automatic install since i have nginx with certbot already running on my server. I copied the default nginx config from here . THe only thing i changed was replacing the domains to the subdomain and change the path of my certs. I checked the configs with

nginx -t

wich came out successful.
It worked in the beginning. I then changed some settings (I cant remember wich ones). But Im not certain if that has to something.

Steps to reproduce:
1 fresh install
2 nginx config from the kb
3 change some settings in the admin ui

Actions taken to resolve so far:
I reinstalled amp. Aswell as checked the nginx config File

[Mike]

Is the reverse proxy on the same host as AMP? If so did you let AMPs installer configure it?

[hlarc]

Yes Its on the same host running as a systemd Service.
No I did not because there are other sites running wich depend on nginx.
And I did not know if it would just add a config file to the

/etc/nginx/sites-enabled/ Directory. Its exactly the Template with just the changes in the Domainnames and SSL Certs.