Hello, 
I am trying to complete the Customize a Sales Path for Your Team and I get all the way to the last module and am getting an error ID BIRZRTTV. I have done it in my challenge Org as well as one of DE accounts. Please see error below. 
"Step not yet complete in agideon@huskypupsfun.com
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: BIRZRTTV"