Labyrinth not appearing

Labyrinth not appearing

Just got done clearing Bone Crypt map and have a quest tracker for

*The Lord's Labyrinth: Complete the Labyrinth

Only problem is no portal entrance for a lab exists within this map at all. I thought I was crazy but ran through the whole map 3 more times after clearing to confirm that no lab trial exists in this map, despite what the quest tracker says.