Quick Design - Free Online Design Courses

Not able to access the content

When I open this extension, no content is shown except the name of the subjects. When I click on any of them, nothing happens. Also when I click on the button "Click to view more courses" nothing happens but only a new tab is opened which is the same one. Please fix this issue as I really want to experience this great extension that was suggested on medium.com. I hope the concern is well taken care off!