Error encountered while completing the final mission of the third campaign, "Tribes of the East".

I'll check if I have this bug soon. I'm finishing clearing the territory. Gotai is almost at level 33. If there aren't enough neutral creatures, I'll gather a crowd in foreign castles and turn them into experience. Then I'll visit the Elder Silvans and head to Shahibdiyya.

If I haven't made a mistake in my calculations, I've already completed 55 missions in the campaigns of the original game and its expansions. I haven't encountered any bugs yet. Knock on wood, knock on wood, knock on wood.

Added after 22 hours and 37 minutes
And in this mission, I didn't have any bugs. I defeated the hero standing at the gate, and then I took Shahibdiyya.