Stucked at the last gathering for the Herbalist Task I am

Seems that the the last quest for the magistrate still appears in the dungeon.

Ya, I did the Magistrate quest already. Picked up every spoils I found and still, the third material is not found. When I finished the Magistrate quest, I went back to the dungeon and it seems I can't enter the center room as it says at the door there as "Exit from Magistrate quest" or something like that. Which is baffling me Ah well, I'll just ditch the quest then... Any consequences on that?

On the side note I see the game as enjoyable if I do not think of it as a direct sequel the DA:O. It's great as a standalone game, should be named Rise of Hawke or something haha

A habit taken down from DA:O, yes, I've pushed TAB like, all the times I'm in a new area But failed to find any But, I guess I just let this go. Gonna go for another round in harder mode after this