I am attempting Challenge 7 on the Service Cloud Specialist Superbadge. As soon as I group descending for Type I get this 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: FEHXKVKF

The Superbadge Challenge instructions read:

First, create a report to help support management understand why customers are reaching out. Build the Case Reason and Type Analysis report and store it in the Cloud Support Reports folder. Organize first by type, then by case reason, with the most frequently used type shown first and the least frequently used shown last. Display the case owner, account name, and subject, and only closed cases. Include a graph on the report where each column represents a type and case reasons align atop each other.

When I attempt to do as the instructions state I get the error above.
However when I tried to rebuild the report I accidentally sorted incorrectly and got a non-critical error message:

Challenge Not yet complete... here's what's wrong: 
We can't find the result 'Sort: Descending' in Grouping1. Ensure you group report results correctly.



I did this on a fresh DE - I do not feel that the issue is with my environment.

Can anyone please assist me? 

Thanks
 

I am attempting Challenge 7 on the Service Cloud Specialist Superbadge. As soon as I group descending for Type I get this 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: FEHXKVKF

The Superbadge Challenge instructions read:

First, create a report to help support management understand why customers are reaching out. Build the Case Reason and Type Analysis report and store it in the Cloud Support Reports folder. Organize first by type, then by case reason, with the most frequently used type shown first and the least frequently used shown last. Display the case owner, account name, and subject, and only closed cases. Include a graph on the report where each column represents a type and case reasons align atop each other.

When I attempt to do as the instructions state I get the error above.
However when I tried to rebuild the report I accidentally sorted incorrectly and got a non-critical error message:

Challenge Not yet complete... here's what's wrong: 
We can't find the result 'Sort: Descending' in Grouping1. Ensure you group report results correctly.



I did this on a fresh DE - I do not feel that the issue is with my environment.

Can anyone please assist me? 

Thanks