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Deborah GuinnessyDeborah Guinnessy 

can't download app or check challenges in Trailhead

When I try to download Salesforce Adoption Dashboards I get an error message that it is already downloaded. Somehow I have two orgs now, this one from my training class https://na40.salesforce.com/00O/o (it should be available for another 2 weeks). Which I used to login to when I started Trailhead and was working until yesterday. And this one https://resourceful-badger-236133-dev-ed.my.salesforce.com. Don't know where that came from. The Trailhead playgroud is loaded there but I can't get the app exchange to let me download the Salesforce Adoption Dashboards to this org. When I try to check a challenge now it checks the badger one and says I have not done the work but I can see the work in the other org. Tried setting up a sandbox and a developer id. Run out of ideas for fixing it. 
Alex EzhilarasanAlex Ezhilarasan
You can change the Org from 'Launch your hands-on org' dropdown(you can see this option near 'Verify Step' button). Select the appropriate org and verify the step.

-Alex
Deborah GuinnessyDeborah Guinnessy
Tried that. Didn't work. Tried logging in as a developer, managing my org and creating a new playground. Wasn't able to make any of that work. 
Jim Coughenour 5Jim Coughenour 5
I as well have not been able to complete the last unit of Admin Beginner, despite using suggested UK org workaround, plus deleting the app and reinstalling from the UK org, etc. Now I'm getting login errors into UK org - I've tried each step 3-4 times and can still not complete this simple exercise. I've spent at least 2 hours trying to complete a 15 minute exercise. Can you simply credit me for this unit? Because I see no way to complete it given all the bugs in the existing setup.