I followed the steps to complete a challenge on trailhead but it cannot be verified. I was given an error reference id: IUAOFLHV. Is there anyone who can help?

Detailed message:
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: IUAOFLHV

I followed the steps to complete a challenge on trailhead but it cannot be verified. I was given an error reference id: IUAOFLHV. Is there anyone who can help?

Detailed message:
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: IUAOFLHV