Did you move it from one Mac to another? I don’t have much experience with MacOS but I did try to install it on Catalina last week and that was coming from Windows 10. It actually worked perfectly. MacOS ended up having more issues than I wanted to deal with and I’m more familiar with Windows so I went back to it. My server is on a 2012 Mac Mini.
Did you grab just the .plst file or did you move the Server folder too? Since I didn’t have an existing plst file I didn’t do that, but I did just dump my Server folder that I copied from Windows in to the Library folder like it said and it worked.
Hi thanks for your help. I basically hadn’t followed the instructions to the “T”. I put the new files on before starting the Plex server so it basically created 2 copies. So just deleted everything and started again. Thanks for helping everyone!