Joe,
The Include Visualforce Page is a standard Visualforce page that controls if the profile can see any included pages, so if those profiles don’t have it they won’t be able to see any included pages (even if they have access to the pages that are included). It’s more of a security setting than an actual page. Would you mind checking the profiles to make sure the Include page is listed on their Enabled Visualforce Pages?
Thanks!
Amy
