The main quest is not bugged ; it works, but... the pb is that the action of a quest doesn't appear because it doesn't reset, due to the large amount of players waiting in the area.
I passed through the portals yesterday, and could talk to the groundskeeper in the hall of statues today. This is possible if people stay out of the room for some minutes and let the quest reset.
- ouside the caves for the portals
- in the previous room (it's a bridge if i remember) for the groundskeeper in the hall of statues
Now you know what to do and how to complete it, see you soon in the veteran area