Change the required level for this quest from 45 to 38.
The Quest: https://database.turtle-wow.org/?quest=40129
The Quest that points to it (should also be lowered): https://database.turtle-wow.org/?quest=41103
Stealing a Core is a TurtleWoW custom-quest for Uldaman.
In the LFG, Uldaman is listed as level 40-50, and the vanilla Uldaman quests all require either level 35 or 38.
But for some reason, this Uldaman quest requires level 45. A whole 7-10 levels above the other quests for this dungeon.