Similar bug in duels, except I get an error which I believe is because my deck is invalid (no idea why considering I built it within the game after selecting my hero). However, since I haven’t played my first game there is no way to retire the deck. So I am locked out of duels for the time being. Also reached out to customer support who directed me here… frustrating that there is no one who is able to just manually retire the deck for me and refund the 150g. Happy to provide more details if blizzard is actually reading these posts.