Oddly, it works fine on an LG TV, an Xbox Series S, web browsers, Android Plex apps, and Windows desktop app. It was working happily up until one week ago, I haven’t changed anything in the server setup, only installed a Plex Media Server update, but that didn’t coincide with the problem. Any thoughts?
It’s a brand new Samsung TV, so the Let’sEncrypt SSL issue shouldn’t be the issue.
Plex Media Server is on the latest version, running on Linux in a Docker container via Unraid.
Tried the obvious of restarting the Docker container, restarting the server, restarting the devices, uninstalling Plex clients from the devices, restarting the modem/router.