Patrick
Not sure if you are talking about the Admin Role in the acl or the admin setting on a users.
The ACL role should not have anything to do with the web page.
I do not currently have an 8.5 server or client to test intrapages on so I can't really tell if this could be an 8.5 problem or some configuration error on your side.
Please try to run intrpages both locally and on server and see if you get the same results.
You must provide error and trace logs , I have nothing to trace your problem with.
It is my biggest concern when users are not getting intrapages working. I try to add as much information as possible to avoid this. if there is anything you find out regarding this issue please let me know so I can improve the install and setup procedure better.
In next release I have removed the ACL role and added option to download the error and tracelog from the debug pane