Ran into a problem this morning with unraid locked up, did a hard reboot, everything almost came back. The biggest issue was Plex would start, but give the error that the server is currently unavailable on the webgui from the same server. So it does not show any local media. I removed the docker image and reinstalled it, still the same error 

 

Here is my docker run output

 

docker run
  -d
  --name='binhex-plexpass'
  --net='host'
  --pids-limit 2048
  -e TZ="America/Chicago"
  -e HOST_OS="Unraid"
  -e HOST_HOSTNAME="Chimaera"
  -e HOST_CONTAINERNAME="binhex-plexpass"
  -e 'TRANS_DIR'='/config/transcode'
  -e 'NVIDIA_DRIVER_CAPABILITIES'='all'
  -e 'NVIDIA_VISIBLE_DEVICES'=''
  -e 'PLEX_CLAIM'='claim-7WvDaqZj3y5nGazzdZ4F'
  -e 'SHARED_NETWORK'='no'
  -e 'PUID'='99'
  -e 'PGID'='100'
  -e 'UMASK'='000'
  -l net.unraid.docker.managed=dockerman
  -l net.unraid.docker.webui='http://[IP]:[PORT:32400]'
  -l net.unraid.docker.icon='https://raw.githubusercontent.com/binhex/docker-templates/master/binhex/images/plex-icon.png'
  -v '/mnt/user/appdata/binhex-plexpass':'/config':'rw'
  -v '/mnt/user/PlexMedia/':'/media':'rw' 'ghcr.io/binhex/arch-plexpass'

d06547572c66f7aa8f8b0339aa6d168dad02836698dde57bcfdea0714e1031b5

 

The server is Chimaera and I am accessing it directly from its IP port 32400. Before this outage it been running fine for half a year

 

i had a similar issue when i upgraded my server hardware.

i ended up going into my Plex account, removing the 'old plex server' and adding the new one to my pinned items. Maybe have a look at the side section and Pinned items, hopefully its something easy like that for you.