Hi there,
I am having the same / similar issue today, I came into the temple 'the fast route' and have killed everyone on that side of the locked gate besides Farentis. I passed the tile panel test but nothing happened.
Savefile/log/dxdiag in this google drive 7zip:
https://drive.google.com/file/d/0BzwttIj7p3nPeklvcjBfdVE0M0E/view?usp=sharing
I will try again the main route but would rather not! Many thanks