Bug with hero under lvl 10 in Duals mode

Played the new duals mode and accidentally selected the Demon Hunter class, which I have not played to level 10 yet. I still got into the next step where you see an overview of your hero and current deck. When selecting the button to go to your collection and start building the deck nothing happens. It shows the animation for the button being clicked but the collection does not open. As far as I can tell there’s no option to forfeit this run either

have you completed the solo adventure to unlock demnon hunter?

I literally just did the exact same thing and I can’t get around it! I’m stuck …