The game gets stuck after the "press any button" campfire loading screen, with an endlessly rotating block of redstone in the bottom right corner. My issue is similar but not identical to others reported here. My daughter has M Dungeons on her Switch account and it worked fine for offline games (solo and multiplayer) for several hours of gameplay. As soon as I logged her into a Microsoft account (we wanted to try online play), it stopped working. This now prevents us having offline AND online play. It is possible, however, to play the game with my account or with my son's on the same device. I wondered if the problem is to do with age restrictions (she is the youngest in the family), or if it is because we played for a while without linking to a Microsoft account before deciding to link things up.