Yesterday´s (18. january 2025) update broke AppleTV Plus on my AppleTV 4K device

So i bought AppleTV device for Christmas, because my previous device (Nvidia Shield) started to act up. I did set it up with 2 accounts, the default tied to my AppleID, under which i installed Netflix, MAX, SkyShowtime, etc... and another one tied to my sister´s AppleID, cause she is subscribed to the AppleTV+.

Thus, when i wanted to watched something on AppleTV+ (just yesterday last episode of Silo), i would just switch between the accounts and everything worked fine.

Until today, when i went off to watch first episode of Severance, and it would not work, freezing on the AppleTV+ logo, with only subtitles running, giving me option to press "Skip", after which i get message, that i cant play the video, cause i dont have access to it, or is no longer available.

I did restart the device several times, but nothing helped, it simply wont run. I figured out, perhaps updating the tvOS might help, but it says i am on the latest version, and the last update happened - yesterday. So i am fairly positive thats the point where it broke.

Please do advise how do fix this, if you know, or how to proceed. Its truly maddening.

Thank you.