The game freezes when attacking a unit!

FerrArt, it has been repeatedly mentioned on all forums dedicated to Heroes that save files from different versions can cause glitches. This complaint is especially common after the release of a new patch. Which campaign did you stop at? If the campaign.sav file is saved, all completed missions will be available. I don't remember anymore how the skill wheels of different versions differ. It is definitely necessary to replay the 3rd campaign, as the Necropolis skill wheel has changed significantly.