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Raj R.Raj R. 

How to resolve error on Add Business Logic for Build a Battle Station App?

Hi, i am attempting to finish Add Business Logic for Build a Battle Station app and have been running into the following 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: VOBJIKYJ

I need help to figure out how to resolve this issue. I have enabled feed tracking for the battle station object, but still running issues. 
Best Answer chosen by Raj R.
SandhyaSandhya (Salesforce Developers) 

Make sure that you are using new DE org for this challenge and also you have not created a namespace in your org.Usually, this error goes away after some time once you log out and log in again.Try to clear your cache and browser cookies and try again.

Hope this helps you!

Please mark it as Best Answer if my reply was helpful. It will make it available for other as the proper solution.
Thanks and Regards