I played the mission multiples times but i can't seem to get past the part where you have to build a barrack. I looked at a walkthrough of mission and the youtuber seems to be building the erebor barracks. But the only barracks i have is the hall of warriors. Has anyone encountered that issue before? Is there any fix?
EDIT: I have also noticed that mordor heroes stop gaining new abilites as sauron levels up after he is given the ring.