First thing, do yourself a favor and change the network of the Plex server container to use “host network”. Once you’ve done that and restarted the server:
I’m no expert for Linux, but this should get you going: Unable to access server after password reset - #99 by FordGuy61
Official documentation of the Plex docker: pms-docker/README.md at master · plexinc/pms-docker · GitHub
