I am on Step 7 of the superbadge and getting this error and I didn't change anything except what the challenge was asking in the playground. any thoughts?
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: XCFGKCSR

I am on Step 7 of the superbadge and getting this error and I didn't change anything except what the challenge was asking in the playground. any thoughts?
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: XCFGKCSR