[Reported] Puzzle Quest Stopped Working

Playing Dungeon battles on Auto, in The Doomholt. The game is not in focus (until the battle ends, I read in another window).
Very often (almost every time) I get the Windows error message (shown below) and the game terminates.
The current enemy is always the Aulderak. If I start the game again, the battle continues, and I can win.
I have tried in another dungeon, so far couldn’t reproduce the error elsewhere.