I am stuck on this but with a twist.
I get no errors from Code School when I submit the answer -- it just doesn't work, and Github gives a 200 response to a ping back from the heroku link provided with the correct username. I've finished the remainder of the course, this is the only exercise left to finish.
The 200 response I thought I was getting was not from the Code School submit, it was from the set up of the webhook. So, I'm getting no errors from Code School OR Github, and really have no clue as to how this needs to be fixed.
(and I've checked the username repeatedly, it is correct). The content type is application/json, no secret, and I've tried every configuration of the trigger options. When it is select individual events, I select only the pull request as suggested here. Active flag is checked.
I have also deleted and recreated the webhook five times.
These are the errors in the console when I try to submit.