The hands on challenge to install Dream house app is not working. It does not find my trailhead playground and yes, I am logged in.  The app will install on my SF Org! 

Trying to complete the CRM Essential, Under Data Quality-Assessing the Quality of Data and I am unable to download the assessment APP. It used my regular log in and downloaded the app in our live production.  It will not take my trailhead log in - at all.