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Harish S 58Harish S 58 

Verifying challenge error in trailhead

got below error when I click & verify trialhead module

Challenge Not yet complete
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: DXUOLBZQ
VinayVinay (Salesforce Developers) 
Hi,

Try in new playground org if you still see issues kindly reach out to trailhead support team.

https://trailhead.salesforce.com/help

Kindly let me know if it helps you and close your query by marking it as solved so that it can help others in the future.

Thanks,