I also had this occur, however I was in the Dank Crypt, trying to use 2 characters to find/disarm the traps. I sent Astarion to disarm one, and without thinking, then swapped to my PC to do another, when the dice roll came up, I am assuming Astarion was supposed to make it, however I was not currently selected to him, therefore could not actually make the roll. No inputs worked, so had to force-exit the game.
Interesting that others have had the same problem but for much different reasons it seems?
