Hi there,
I have experienced constant crash after my connection timed-out in an adventure mode game last evening. I just left the game running for an hour without returning to it and it dropped connection afterwards. Now whenever I try starting a game in any mode, the game will try to start matchmaking, and then crash and send me to the title screen. 
It seems that I can still access my collection(with some basic cards missing), but not the store. The game doesn’t crash when I don’t start a new game. It crashes after I start playing in the play mode, adventure mode, tavern brawl, and battlegrounds. Any idea on how to fix it? 