Is Plex Media Server running and is it claimed?
Point a browser at the Plex server: http://<ip address>:32400/identity. You should see a line of XML containing claimed="0" (unclaimed) or claimed="1" (claimed).
Example: <MediaContainer size="0" apiVersion="1.1.1" claimed="1" machineIdentifier="deleted" version="1.42.2.10122-3749b980e" data-google-analytics-opt-out=""> </MediaContainer>
If unclaimed, you need to claim it: http://<ip address>:32400/web (try http first, not https, don’t forget /web).
If working, you’ll get a Plex login screen. Login, click the wrench icon (settings) in upper right, and see if you can reach the server settings (on the left, below Plex Web section). If you can , go to the General section and claim the server.
If you cannot claim the server via Plex Web, then use the User Credential Reset utility. See my post just above (link). Use the same wget, etc. to download and run it. It does not have to be in a specific directory, it can be located anywhere. You must run it as root.
