Hi!

I'm at the mission there I'm supposed to meet karliah at the standing stone glitch, but for some reason(s) she aint there!!! I have tried many different times, still she doesnt show up.....

PLZ HELP!!!

First you are sure it's the right place? its not the birth sign stone you click on, one of them are nearby, it's another stone
You quest marker should point to it.

One tips is to be away some days and see if she comes back, fast travel to solitude, to the collage and back and see if she shows up.

Yes, I am sure, of course. I've tried many different ways, riding, walking, fast traveling, waiting at the location for hours.... Nothing!!
Must be some kinda bug!!!?