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Gaurav Jain 7Gaurav Jain 7 

Trailhead Challenge Error CENZTETL

I'm doing the Create a Satisfaction Survey Project and have hit this problem in my existing trailhead org and a brand new dev org that I've just created:

Challenge Not yet complete... here's what's wrong: 
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: CENZTETL
Best Answer chosen by Gaurav Jain 7
Gaurav Jain 7Gaurav Jain 7
It is resolved by using brand new developer Org

All Answers

NagendraNagendra (Salesforce Developers) 
Hi Gaurav,

May I request you please confirm if you are using a brand new developer org for validating the challenge?

If you are using a brand new developer org then please double check that your org doesn't have a namespace enabled.If that doesn't help please give a try by restarting the batch

Still, if the problem persists log out of all accounts and log in once again in a different browser by clearing the cache and cookies which should probably do the trick.

Please let us know if this helps.

Mark this as solved if it's resolved.

Thanks,
Nagendra
Gaurav Jain 7Gaurav Jain 7
It is resolved by using brand new developer Org
This was selected as the best answer