It is true that this mod is stuck in the second mission, downloaded from the olly pack. Apparently the error arises depending on where you put the troops.
I was able to avoid it after several attempts, deploying the units on the left slope and launching them into combat as soon as the battle started, the rest of the mod works perfectly. I finished it last week.
I really liked the dwarven units except the ironbreakers with cannons, since it is a unit that requires a lot of micromanagement as it has a short range, if I were to play again, I would choose the option of having another battle cannon.
The rest of the missile units are fantastic and deadly. The bears are very cool but in the last phases of the game they die easily, it is better to play stationary and with projectiles. In short, fun. Now I will finish the goblins mod in hard mode. all the best!