Hello,
I tried to add a new template, by clicking the "add a new file" button on github UI in the template/cg folder.
As usual, github ask me to fork the repository first, but when clicking the "Fork this repositoy" it trigger an error:
An unexpected error occurred. Please try again.
And looking at the console, I see a 422 error:
POST https://github.com/w3c/onboarding/new/master/template/cg HTTP/2 422