I've been battling with this for a while (like a year) so I can't even document what I've been though. I don't even remember honestly.
I can no longer delete shows or episodes using my web browser (lan) or my roku app. It did work then today it didn't. I haven't updated my linux install (mint mate 19.3) nor Emby 4.4.3.0.
I've had issues since install and have tried changing users groups permissions so many times I lost track of what I have done.
So, before I start asking the wr