Media not showing up, saying server unavailable despite linking

[dbirch]

see:

• https://support.plex.tv/articles/204281528-why-am-i-locked-out-of-server-settings-and-how-do-i-get-in/

• You need to reclaim your server, but don't dare to touch the Windows Registry

• Server credential reset utility for Linux-based platforms

• http://<IP_OF_PMS>:32400/identity Check claim status

• GitHub - ChuckPa/UserCredentialReset: User Credential Reset utility for Plex