Landing Page Sites Display doesn't show any of the sites

Hello,
I updated the Site Categories plugin this morning and now the Landing Page Sites Display doesn't show any of the sites (links).

The Landing Page Categories Display Page seems to be working fine. It shows the different teachers and the number of sites in each.

But when you click on a class it takes you to the Landing Page Sites Display page and it doesn't give you the list of sites (students sites) like before the update.

This happened on another school site with the same setup I have on this site.

Thanks for the help,

jayjay