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Kyle WesleyKyle Wesley 

Challenge Not yet complete - 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: WDYHNTUE

ShirishaShirisha (Salesforce Developers) 
Hi Kyle,

Greetings!

Please feel free to reach out to the trailhead team by creating the case as the error code can be investigated by them only.

https://trailhead.salesforce.com/help

Please mark it as best answer if it helps you to fix the issue.

Thank you!

Regards,
Shirisha Pathuri