Can play only decks given from start

Sceop

Hello,

I can play only basic decks I got from the start of the game like inteleon, blissey etc. For some reason I cannot use my own deck, nor eternatus deck I got from battlepass. It just wont let me choose any cards in the match. I also cannot test decks. Game will just freeze. Tried to contact support but they couldnt help me.

I also reinstalled windows.

Any ideas?