Enroll Now button opening a blank white box and doing nothing

I have created my own custom Courses page. I have called in my courses with CoursePress Shortcodes.

I go to that page (http://micrometa.rigginglabacademy.com/courses/) and see all the courses laid out like I want. The issue is that some of the "Enroll Now" buttons take the user to the cart and some open the white pop up box for new registrations.

On the page I specified above, the first row works just fine. The second row, the middle option gives the pop up. Everything from the third row down gives the pop up box.

I have checked my shortcodes and they are all correct.
I am running the most recent version of CoursePress.

I have already granted access.