In my campaign game with brave, suddenly half my units can't use special abilities. As in, I can click on a unit like a lich, and there will be no option to use spells. This happened to about half of my units, and began suddenly and randomly at the start of one of my turns. Not sure how to reproduce this at all, but it is a pretty serious bug.

Please help.

I didn't find the right solution from the Internet.

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