Panasonic UB 820 player. No picture, but sound

[Matt80]

Hi there,

I am having, for me, a strange problem with my Panasonic UB 820.

When I insert a SD on Blu ray disc (this tv show: https://www.amazon.se/-/en/dp/B07J3BBZ18) i can only hear the audio but there is no picture. The menu is alright, but when i start an episode there is only audio. All other DVDs and Blu rays play fine.

Strange thing, everything has worked fine til now. Have already watched 80 episodes without issues. Ive tried to play the disc at another player and it did play fine.
I have not changed any settings,, only thing that has happened is that i lost my internet connection for 2 hours. After that, this problem came.

Any suggestions what could be wrong? Every lead is appreciated.