Bug in new beta client.

Hi. i'd like to report a minor bug: it seems we are ( sometimes) unable to buy champions once we are creating a game. that happend ( "due to unknown error") and went back to normal as soon as i left the game creation. for info, i was the host, on a solo/duo ranked, and i was on the screen in which we chose our roles. idk if this is revelant. maybe i'm the only one with this problem.