Sacred Tree

Hello! I'm playing as a Barbarian. I went through the Necropolis on the right to the fountain with doubled mana. My hero was caught by elves without any troops, so I had to revert to a previous (distant) save. But when I tried a different tactic: I calculated that as long as the Voidwalker on the right is alive, and other heroes can defeat him with Adrian, I sent Kaspar against the Orcs, then captured the Elven town with him. Adrian held the defense. But when I cleared the map with Kaspar, I brought Adrian to the Voidwalker, and he was gone (I was asked in the form: Are you ready to fight? but there was no battle, and no figures either). The only thing is that I tried to approach with a hero from the tavern twice beforehand. As a result, the Necropolis town was taken without a fight, the purple creatures spawn there, the mission is not completed, and the troops on the border guard did not disappear. I don't have any mods, and I cleaned everything before the game. Thank you for the map, it's great!