Though i am the Org admin in GitHub and have authorized Circle CI, the Org Settings screen says that “To view/edit this page, you must be an organization admin on your VCS-provider (e.g., Github).”
Afraid I can’t help you but wanted to report that I’m seeing the same thing.
The other day I could get further than this, to the point of entering credit card details (which I didn’t do as I was still awaiting authorisation), but today I’m seeing the same thing that you are.
It has been logged as a bug here: Locked Out of Organization Settings