Round table

Didn't know where to post this, so I decided to post it here. I encountered a bug or something else; here's the situation: as a Fire Expert, I couldn't cast Berserk (it wasn't even active – the units weren't highlighted) or Blindness (no anti-magic spells). After racking my brain, I decided to ask if anyone knows or has encountered something similar. The game was long, and there was a bug (hero duplication), and I was kicked out once. Maybe that's relevant too... Anyway, here's the save file; if anyone is interested, they can test it themselves. Thanks in advance!