No course of action for people to participate in courses

Having set up a course (FREE) and added a registered user to the students menu, then sent an invite to that person, there's no mechanism for them to then begin the course.

By clicking the email link, as the invited user, I am shown a poorly formatted page, with bits of text all over the place, and no means of taking any further action, e.g. participating in the course?

http://www.theservicetradescollege.com.au/courses/no-payment-test-course/