I can confirm that the map link for this quest is bugged. It sends you to no place in particular. There is no icon indicating the appropriate spot in Western Thanalan. It doesn't help that the text of the quest includes the following as the only mention of a location:

According to Minfilia, there has been another potential sighting of Lahabrea in the North Shroud. Speak with the Sylph Noraxia for the details.