Forum:Create Gallery or Slideshow not working - Blank

On my Conan wiki, when I go to create an image gallery in either mode, the popup comes up blank - no gallery builder window - except for the "finish" box Same thing happens when I try to modify an existing gallery. If I click finish, a blank gallery appears.

It was working fine a week ago. I can still create a main page slider, but creating either a slideshow or a gallery gives me a blank page.

Using IE8.

Conan wiki