Ah, you are all correct. I do not have The Ancient Seal started. I have done what is required to start it according the the wiki:
Your first time visiting Sanctuary of Irossia, a room to the West will be gated. Once you are level 13, and visit Fögas, Freetown, Icemist, New Garand, Nivarian, or Tower of Tremadan with Hirge as a companion, she will start a dialogue and tell you to go there.
I have been to most of those cities well over lvl 13 with. Hirge for a companion with no effect whatsoever.
Did you visit one of the mentioned locations with Hirge as a companion AFTER the update? Then the quest dialogue with Hirge should definitely trigger if you hit the right spot. Just walk around a little near the respective town entrances.
If you visited those places prior to the update, then you have to visit one of them again.