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jayashree bhosalejayashree bhosale 

eference error id: GISVKPBG

Hi I was doing Lightning Experience rollout specialist and for challenge i no 6.got below error.so i tried with new DE astill its giving me error as below mentioned.
"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: BNRZGDYZ"  
AbhishekAbhishek (Salesforce Developers) 


There is an appropriate team who can help you with this issue as we do not have access to this error code that you have mentioned here.

I would request you to reach out to the trailhead support here (https://trailhead.salesforce.com/help?support=home)

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

jayashree bhosalejayashree bhosale
Hi Abhishek,
I tried approches given by Trailhead Academy chat but Still, I am facing same issue for 3 trailhead challenges.
with different reference ids. 
AbhishekAbhishek (Salesforce Developers) 
Jayashree Raise a case with the trailhead team and they will reach you to further proceed on your query.

Explain to them all your issues so that your challenges will be completed.
jayashree bhosalejayashree bhosale
Ok.Thanks Abhishek.