People of Thedas

I'm playing my fourth iteration of Origins, and I'm stuck on the second-to-last portion of the Fade. I finished all the demons and two of the nightmares, but I have a routing issue in Shale's nightmare. Has anyone ever heard of a bug that prevents walking from the pedestal down to the main area of the nightmare island? I can't get past the narrow pathway there. I zoomed in as close as I could to check the cursor and it was gray all across.

This is very aggravating. If no one knows a workaround, I might have to redo the whole quest. D: I wasn't even sure I would make it through without reloading to Redcliffe, and now I'm so close and this stupid bug might set me back. Argh.

[Note for mods: I'm not sure how to tag this so I'm guessing.]