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Saroja MuruganSaroja Murugan 

trail head error - Challenge not yet completed

Hi All,

In the below trail i received the error.

Admin Beginner-> Lightning Experience Customization-> Create Custom Buttons and Links 

Error Message
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: MIBJCQNW

Thanks in advance
SandhyaSandhya (Salesforce Developers) 
Hi,

Try to logout once and then login again to check the challenge.Also refer below link.

https://developer.salesforce.com/forums/?id=9060G000000Bj9ZQAS

Best Regards,
Sandhya
Saroja MuruganSaroja Murugan
Hi sandhya,

Thanks for your reply.

Im still getting the same error. I have tried the both ways as you told.

See the screen shot 

User-added image

Thanks
Saroja
SweetPotatoTec