When you say “nothing happens” when opening Plex Media Server… do you get an error message of any kind? Running the Plex Media Server app is not supposed to open a window / UI… it’ll run in the background – with only the icon in the system tray showing it’s there.
If it’s dead on start… can you manually collect the server logs, zip them and attach that file here?
%LOCALAPPDATA% refers to a folder in your Windows users folder that’s usually hidden. Usually this is:
C:\Users\<your user name>\AppData\Local\
