I had this bug too and gave up after 6th round
After downloading walkthrough I found out that Enya is joining me again so I grouped some units to make place for her.
But imagine a situation that you are player which is satisfied with autosave and doesn´t use normal save. In this case this bug would cause, that you would have to play the whole game again from the start. It is a horrible thought.
Instead of the bug above, there is another which prevents to continue in the game. In warland when you get to Rafael, he joins your army immediately after first conversation. To save my authority I wanted to hire some furies before this, because It doesn´t matter if the authority is minus something. So because of no portal I used the spell to get to activated portal and went to hire some furies. When I came back I defeated all enemy around the castle and then the enemy inside the castle. After that Rafael joined my army without asking and Rafael quest was completed. But now I still have "The Defence of Warland" quest. Unfortunately I defeated all group before joining Rafael so there is no more enemy to kill. So I can´t continue and have to load some older save which bother me so much.
I really wonder how is it possible that there are still at least 2 big bugs (protecting game to continue) after instaling Patch 1.1.0.128.