Unable to Enroll in Courses in Coursepress Pro

Hello,

I am trying to "Enroll" in a course. I fill out the sign up information and submit. The form validates and shows the loading gif animation for a few seconds and then the popup box goes blank and never loads to anywhere. The user is created but is not added as a student to the course.

You can see what I am talking about here: http://factorperformance.com/courses/high-performance-you/

I have already gone through and updated/deactivated all the plugins and reverted the theme to default. Problem persists.

I have already granted site access.