I have checked it out, but I can’t see anything there, except that my plugin is not loading at all. That CoursePress Pro is a theme from what I can see, and it is possible that this theme overrides some normal WordPress processes, preventing some plugins to load properly or to detect pages. And, I have read a bit on the Internet, many users are complaining that CoursePress is overriding some key elements of WordPress for some reason. That could be the reason for my plugin fail to load on some pages.
I would need to test with it directly to be able to say what exactly is the issue.
Milan