My AI generator isn't loading for Storyline

I see the AI Assistant in the corner of Slide View and Story View. It lists several options including Generate Image, Generate quiz, etc. However, when I click them I just see a blank white lightbox. I've tried updating, loading different projects, and creating a new project with the same issue.

Is this because the trial is over and now I have to start paying for it? Or perhaps my admin disabled it?