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David Allen 26David Allen 26 

Unable to complete challenge for "Business Administration Specialist" superbadge.

I am unable to complete challenge for "Business Administration Specialist" superbadge. 
When checking challenge 3, Create reports and dashboards, it says

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: RMKQULNG
Close errors.

I started with a clean org for this and have done nothing in it except what was required. Though of course I may have done something wrong.

Does anyone know how to address an error such as this? 
Best Answer chosen by David Allen 26
David Allen 26David Allen 26
I fixed it myself. I edited a layout of a table in the dashboard and refreshed it, even though that was a random guess in teh dark. 
I tried again and it worked. I have no idea what it was thinking. They need a bit more error-handling code in that checker.