Unable to play any game mode

Just completed the tutorial and trying to play practice mode versus the computer in order to unlock the classes but I can’t.

I keep seeing an error about my deck etc. I can’t delete the deck but I need to unlock the other classes first. I have edited it countless times without success. I even tried a deck without duplicate cards but no luck there either.

I can’t seem to play practice mode or versus other players. Game is basically unplayable at the moment.

Does your deck have 30 cards? That’s about all I can think of