I'm getting an error on the Prepare Your Salesforce Org for Users badge in the Create Chatter Groups section.

I'm following the directions down to a T but I keep getting this: "Ensure that you are following all the instructions for posting to a Chatter group."

While I was doing the Lightning Experience Reports & Dashboards Specialist Superbadge, I got this error on Challenge number 3,

"
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: DMOJSQLN
"

I created a new playground for this badge and after I got this error, I tried to do this challenge in a new DE and got the same error.

I'm getting an error on the Prepare Your Salesforce Org for Users badge in the Create Chatter Groups section.

I'm following the directions down to a T but I keep getting this: "Ensure that you are following all the instructions for posting to a Chatter group."