I got an "unexpected error" on a superbadge, and it said to post here with the error ID, which was KSDJVGLC. I'm not sure what info I'm allowed to share/receive, but I'm using a new DE. Can I get some help with 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: KSDJVGLC

Thanks for any help you're allowed to provide!