Installed plex and plex media server for the first time, it doesnt load circle spinning forever

this is the first time i use plex and installed plex media server, i bought the lifetime plex pass.

on plex i can see the server name but i click on it and it just show the circle spinning forever, doesnt do anything!

i have try everything but dont know how to make it work ! thank you very much for your help!

I have the same issue. Commenting to follow in case someone responds to you first or has insight.