Hello All.  I received this error message when attempting to complete my Trailhead module:

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: KHORHHIY.

Thanks in advance for the assistance.