Invisible Ramparts no pylons!

I’m doing this quest on my lvl 29 Dark Iron Pally. I got the quest but there aren’t any pylons to put the crystals on. Tried logging out, etc.

“The pylons are only there if you have just taken the quest. if you logged out or rezoned, you’ll have to drop and retake the quest to start it over so the pylons pop up again.” - Zoiphy

I used this and it works.