First and foremost, you didn’t mess up. The error message is misleading in the current WIP. Sorry about that. It’s being fixed as we speak.
Background: During the WIP process, only users who have a validated Rhino 5 license with one of the email addresses associated with their Rhino Account can run the WIP. This is simply a quirky limitation we have for now as we race to develop a more complete solution.
Research: I went ahead and looked at the Rhino 5 license you own. You do indeed own one, but it is validated by your ****@gia.edu account. Your Rhino Account only has ***firstname.lastname@example.org associated with it.
Solution: You can add your ***@gia.edu account to your Rhino account by going here. Then you should be good to go.