So I was fighting against a team in PVP which contained Miko the Marvelous. I eventually killed everyone, except for the clone that Miko created, who ran away from the fear effect. Afterwards, when all the enemies have either been killed or ran away, instead of letting me open the dungeon chest, it just activates my next turn, but there are no targets. I tried to restart the game but it just did the same thing. I ended up needing to retreat. I have attached an image of the problem.