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Soumya Ghosh 12Soumya Ghosh 12 

Error: please post to the developer forums and reference error id: NUUSMQPR

I am continuously getting error. I had a new DE. Got the error and again created a new DE. Again in Challenge 2 for App Customization Specialist, I am getting error as below. All are new DEs

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: NUUSMQPR