Different server images have different internal structures.
Using the plexinc/docker image structure as my reference,
Can you get to the underlying filesystem where /config/Library/Application Support/Plex Media Server/Cache is?
If so, in there, you will find cert-v2.p12
If you see it then do the following:
- Delete
cert-v2.p12 - Restart the container
- After the server restarts, watch for a new certificate to be installed there.
If you don’t have or get a certificate, please let me know