Cannot Preview, Publish or Change Player Settings

I have an Articulate Presenter course with Engage Interactions. I have been trying to work on my course all day and now it appears to be unusable. Whenever I try to preview the course I get a "we're sorry something went wrong with articulate presenter '13" error.

At first I thought the error was caused because I was adding audio; not that adding audio should cause errors, but it was the only change I had made to the course. Now I realize that the issue occurs any time I access an Engage Interaction from within the Articulate tab of PowerPoint. Emphasis on access, because it makes no difference whether or not I actually edit/save any changes to the interaction.

I have tried this with all my backups of the course, so now they are all giving the same error. Each time I opened a course, I went to the Player option to see if I could access that, then I would try to Preview, and everything would be working fine. Then I would access one of the Engage Interactions. Again, whether I made a change to the interaction or not, when I returned to PowerPoint and tried to Preview, access Player settings or Publish I'd get the error "we're sorry something went wrong with articulate presenter '13."

I need to know how to fix this. There's no good reason for this to be happening, unless the software is just faulty.