I tried testing a movie from my home server in plex through firefox and repeatedly got this message, even after reloading.
I knew that they had paywalled the apps on mobile and streaming from outside the network but now they have also blocked watching your own movies through your own hardware.
I do get the point that making software should be able to sustain people but I dont see the move of plex as a fair thing to do. Yes, they have made great software but taking your home server hostage feels like the wrong move.
Even a pop up that says "we need you to donate please" would have been fine. make it pop up before every movie, play donation ads before any movie but straight up disabling the app is kinda cruel.
Anyway, i have switched to jellyfin and it is insanely good. please give it a try. you can run it alongside plex with not issues (at least i had none) and compare the two.
In any case, good luck. Let me know if you need help.
My tech-illiterate mom uses my Jellyfin instance with no issues. I sent her a link to the app store, her credentials, my server's hostname and that was it. And once it's set up, Jellyfin is much more straightforward to use than Plex.
Sure Jellyfin has issues and doesn't support as many types of devices, but Plex is far from perfect. I use it like twice a year, and the UI gets more and more confusing with each update IMO.
Jellyfin doesn’t have an app on every App Store. On some, you have to sideload it, by enabling developer mode and connecting to a PC that is running an App Store server. Then the TV downloads it from the PC.