Yes it is in the maze
You need to be quick. Maybe drop the difficulty.
Also think you need to destroy the gas generator first.
Is it possible to show the map on where the location of the skill is? I'm not sure if I'm running on an old save that missed the skill or whatnot (I got the latest update and got notified the skill moved), I cannot seem to find anything in the map, for one, I cannot even go into the Maze. Really appreciate the help!