I've been playing this game for a while (level 3 and +20 differents cards) and this message keeps appearing when I try to build my deck.
I saw a game play where the guy was level 2 and he was already able to build a deck.
It's getting impossible to play the game with this ****ty deck
Hey, LariLinda! Sorry you're having this issue. Please contact Ubisoft customer support at http://support.ubi.com/
Cheers,
Steve