I suddenly encountered an issue where when I launch the Plex docker, the UI shows up from the local IP address but the server is not visible anywhere. The only content is the default content provided by Plex. All of the server sources are gone and there is no way to search for the server. There is just a link to the PMS website.
I opened a browser tab from the day before and tried to resume some content. It played for a minute or so, then there was some pop-up saying I don't have access to this server and it disappeared. The day before I encountered a similar issue on my AppleTV which is why I was using the web app in the first place.
Anyone have any idea?