Ice and Fire

This save file doesn't work. If possible, we need earlier save files. It seems the issue isn't with hiring AI heroes; I disabled this function through the console, but the game still crashed. If the problem is with the map, why haven't I encountered this in all three playthroughs? It's strange.

There are problems with the early saves.
I simply deleted them to avoid confusing them with the one that needs to be uploaded.

As an alternative, if playing from the previous save, I did the following:
- Killed the 2 heroes that emerged from the portal.
- Took the demonic troops.
- And rushed to the 3rd Castle.

If the map is also the issue, it's unclear why... Erling is just sitting in his Castle. It's strange. He was actively moving around before.

Added 11 minutes later
I don't know if this will help, but the AI's logic was strange in the later turns.
I was chasing a hero, and he had an advantage. He just stood still, and I caught up and killed him. That is, he didn't run away or teleport, even though he had a portal and his army was clearly weaker (I had 200 knights, 700 cerberuses, 70 devils), while he had 20 dragons and some minor units.
In the second case, a hero was running to a Castle, and I teleported into him. He didn't attack or run away. He just stood there. On his turn, he came out and killed me. Although there was a bait near the Castle – a level 1 hero with a small force. He didn't even touch him.

The problems started when I arrived at the 2nd Castle. Before that, everything was normal. The AI was running around happily...