I can't see the content that the short codes are meant to display

As you know, Membership 2 Pro self loads a number of convenient pages, such as a “membership page” that lists different types of membership and allows you to find a signup form and sign on.

I can see that the short codes are listed in the page editor. But the forms that the short codes represent do not show up when I view the page. It seems like none of my short codes are working.