I saw the FAQ that said:
I got an error: Your authorization code was invalid or expired
This happens from time to time. Give Facebook some time, they will fix it shortly.
I've given Facebook 5 days, and I still keep getting the error. The strange thing is that when I don't have a PAGE ID in the input, it says "Access Granted"
It works when I select my profile, but not for any of the Pages that I'm an Admin for.
Thanks for the help,