To access the Grouper Demo, you need an IdP that sends an EPPN.
ProtectNetwork will not do that for our demo site.
If your IDP does not sends an EPPN you may want to use the social options (Google, Facebook, Twitter).
You register first. Then you go back to the \demo jump page and click on the UI. The Grouper Team will get an email when people register, and will add them to a folder with STEM privileges so they can create objects.