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Adelchi PelizzoAdelchi Pelizzo 

Trailhead Challenge > Lightning Web Components and Salesforce Data

reference ID: XKRQFLHI. Error: Restforce::UnauthorizedError. Message: INVALID_AUTH_HEADER: INVALID_HEADER_TYPE

First challenge. Contact has been created and everything work as expected. Why this error?

**** PLEASE do NOT post links to trailhead/help. This is NOT what I am asking. Thankyou. *****

AbhishekAbhishek (Salesforce Developers) 
Adelchi, This reference ID: XKRQFLHI These reference codes are unique, and Based on the ID our Trailhead team checks internally after that they can give a perfect and valid answer.

​​​​​​​I hope it makes sense.
Adelchi PelizzoAdelchi Pelizzo
What part of : **** PLEASE do NOT post links to trailhead/help. This is NOT what I am asking. Thankyou. ***** you did not understand?