“Elia’s Quest” – “The Showdown” [Campaign 3, Mission 5]

Replaying the mission doesn't yield any positive results... And reinstalling the game? Would I have to go through all the campaigns from the beginning again? If I didn't have time constraints, I might consider it, but right now, my goal is to finish the expansion – only the last mission remains... Fortunately, this bug doesn't affect the outcome of the spell...