Three dots loading

Hello, I'm not sure if this is the same issue, but it seems like certain paths in my storyline project, specifically when closing certain lightboxes, I get this loading screen with dots. The odd thing is that the slide I'm supposed to be seeing after the lightbox closes is behind the shade and loading dots. I can even continue to click buttons and progress (at which point the loading dots disappear), however this is a going to live in a course for first responders, and I know this will stop them in their tracks.

Now admittedly I'm new to storyline and I'm punching above my weight with the complexity of this project, but it seems that the only problem is that a loading screen is appearing over it, when everything else is operating fine. Sort of like an error message when the program is operating fine, so the only problem is the error message.

This happens in local preview as well as published for review. I tried saving a new version of the project and got the same results. If you open up the project file, the scene in question is titled Scenario B.

Thanks!