The guided activity for “Learn balance in Design” seems to be broken or down.  I get an "Unable to Open Document" error when trying to open it. https://new.express.adobe.com/new?instructions=view%3Aexpress%2Fhow-to%2Fin-app%2Flearn-balance-in-design

The guided activity for “Learn balance in Design” seems to be broken or down.  I get an "Unable to Open Document" error when trying to open it. This is happening in multiple browsers, and with cache cleared.  https://new.express.adobe.com/new?instructions=view%3Aexpress%2Fhow-to%2Fin-app%2Flearn-balance-in-design