Any idea on how to Place the SolarBot Impact Dashboard on the SolarBot App Page?

I'm in the last step for lightning experience reports & dashboards specialist challenge 8.

How do you place the SolarBot Impact Dashboard on the SolarBot App Page? 

When I save Top Case Drivers by SolarBot Ownership in my Support folders and check my challenge, 
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: GSEOGITY

Kindly help advise. My Challenge 1 and Challenge 2 don't have such issue. 

When I save Top Case Drivers by SolarBot Ownership in my Support folders and check my challenge, I encounter this: 
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: GSEOGITY

Any idea on how to Place the SolarBot Impact Dashboard on the SolarBot App Page?

I'm in the last step for lightning experience reports & dashboards specialist challenge 8.