Literally, I can't play it with the friend.

If I challenged to friend, there are only 60 cards match, 40 cards match, and friendly brawl, and there was a bug where I could select only the standard deck when I select the friendly brawl and press the play button. So I have to leave it. Even if I chose a standard deck, the game didn't start.

And after that, I can't challenge to friend anymore.