In the Trailheads module on Sharing and Notifications, when I press the button to Log on to your Developer Edition, I get the message that I am forbidden to view this page.  I can log in from the Trailheads regular log in page, but not from the module.  Therefore I can't get the green Check Challenge button to get a score.  What am I doing wrong?

I don't know where contact support, so I will post this here.
The Challenge for Reports & Dashboards : Sharing and Notifications was unable to complete.

The Error message:
There was an unhandled exception. Please reference ID: SUILXNRM. Error: Faraday::ResourceNotFound. Message: NOT_FOUND: The requested resource does not exist

 

In the Trailheads module on Sharing and Notifications, when I press the button to Log on to your Developer Edition, I get the message that I am forbidden to view this page.  I can log in from the Trailheads regular log in page, but not from the module.  Therefore I can't get the green Check Challenge button to get a score.  What am I doing wrong?