Saw in another post something that solved my problem.
I was waiting for an update from Samsung and I would still be waiting forever…
The following post, solved my problem:
This may not work for you, but it did for me.
After upgrading to player 3.90.2 I also had the same problem as you. I looked through the pms settings and found my secure connection setting was set to ‘Required’ (Plex recommend it to be set to ‘Preferred’) after changing it to ‘Preferred’ and saving the settings all is now good. I also have to mention that up until this player version, I never had a problem with the secure connection setting being set as ‘Required’ But all good now anyway.