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Vamsi VaddipalliVamsi Vaddipalli 

In J2S Trailmix2 getting There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org.

Hi,
I am doing J2S Trailmix2 module Salesforce mobile App Customization - Compact Layout.
I am getting below error :
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: CJNQNWGT.

Please help me...! Thanks in Advance
Rahul KasamRahul Kasam
same problem i am gacing vamsi please let me know if you get answer..

Anyone help us on this challenge plzzzzzz..
Khan AnasKhan Anas (Salesforce Developers) 
Hi Vamsi and Rahul,

Greetings to you!

Please make sure that you have done all the steps correctly. Because this error usually comes whenever you miss some or the other step. Also, please use a new Trailhead Playground for validating the challenge.

If the problem still persists, I suggest you please reach out to the Trailhead support team for better and quick assistance on the above issue.

Please refer below link to open a case:
https://trailhead.salesforce.com/help?support=home

Please share the case number with me after logging a case so that I can follow up with the Trailhead support team.

I hope it helps you.

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. It will help to keep this community clean.

Thanks and Regards,
Khan Anas
Esak AberaEsak Abera
Thank you Khan, When i use new Trailhead Playground it work.