It is entirely possible that I'm doing these wrong, but when I try using these maps at the appropriate area (I'm 90% sure), I keep getting the error message.
Noted, will look into this.
I tried the quest again today and managed to update the map when I went to the center of the designated area . The quest updated to completed, and when I went back to the Hall the "Turn in" dialogue option appeared.
However, the map isn't removed from your inventory and no reward is given. You can repeat the dialogue as well.
Should be fixed next reset.
The quest completes properly now and gives a reward. But it also grabs all of your maps from your inventory!
Well, they wanted the maps.
Who are you to deny them their maps?
Fix for this should be forthcoming.