I've received a few pms and emails from people with the course loading to 50% and then getting stuck. in all cases but 1 it was because the wrong version on Unity was being used to create the course.
Please use Unity version 5.2.3 as other versions will not work. I'm not sure what else I can do as it's right there in the tutorials section in post number 1 but if you're having problems look at the version number first.
We will try and push a patch this week which will instantly shut down CourseForge if it detects the wrong Unity version number is being used. This should at least in part help people to go and find the correct version!