Haven – “Defeat and Victory” [Campaign 3 – Mission 4]

I was playing through the campaign, everything was fine, but after I "cleared" all the castles of demons, leaving 10 Vestals in each, the population reduction week began. I enter any castle and see:


I tried restarting the game, reloading – nothing helps. Maybe someone has fixed this bug. It's a shame to have to start the map over. I only had to kill Aribanna left.