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Difficulty in logging to Trailhead Developer org

Hello , 

When I try to complete a superbadge "Apex specialist" , shows me a error message and does not login to my org:

The error message is:

"Houston, we have a problem.
You are attempting to log into Trailhead to complete challenges with an org that isn't supported.
Please make sure that your Org is
A Developer Edition Org (it cannot be a Production or Sandbox Org) and
The Developer Edition Org does not have a namespace assigned to it."


I do have a namespace in my org. If required I can delete them as well. Can anyone help me please?
 
Anuj Joshi 42Anuj Joshi 42
Hi S,

if you are using DE org and you are getting this message, then I would suggest you log out of all the accounts and log in again and also clear your browser cookies and history.  OR Another solution would try it in a different browser. or private window.
The other solution would be to select the "Log into a Developer edition."
User-added image

Please mark the solution as best answer if it helps you.

Thanks,
Anuj
 
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I tried doing that as well but got th same error. IT was a complete new computer. User-added image
Anuj Joshi 42Anuj Joshi 42
Hi S,

Did you create a DE org through https://developer.salesforce.com Kindly try creating and try.

Thanks,
Anuj
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I created aNother org and it worked, but i just wanted to ise my existingnorg for trailhead. Is there a way i can get rid of my pre set namespace. I want to remove my namespace. Any help is highly appreciated. 
Anuj Joshi 42Anuj Joshi 42
Hi S,

If the namespace is defaul the it cannot be deleted. https://developer.salesforce.com/forums/?id=906F00000008n2GIAQ
Kindly mark the solution as best answer if it solves your concern.

Thnaks,
Anuj
Narender Singh(Nads)Narender Singh(Nads)
.Hi S,
Once the namespace is enabled for an org, it can't be rolled back. You have no option but to create a new developer org(or you can create a trailhead playground).