Can't Create a New Exhibit

I'm trying to add a new exhibit to a page that has 6 existing exhibits. The page hasn't been accessed in a year, but it is working today when I try to create collections and add items. I can't create an exhibit though.

An error page pops up when I try to save or create a page. It says "The page you are trying to access is restricted due to a security rule."

This is confusing because I'm a super and have access to all the functions of the site.

Thanks for any help.

Have you checked with the site admin? That sounds like it might be in part server issues