I had Facebook set up in Online accounts for a while. Everything worked great. Then out of the blue, I was asked to authorize again. Now every time I try to authorize, it takes me to Facebook in an external browser, and after enter my credentials, it fails to pass that authorization back. Instead, it pulls up a page in that external browser that says
SECURITY WARNING: Please treat the URL above as you would your password and do not share it with anyone.
Funny thing is, the URL it's warning me to guard so carefully has absolutely no identifying information in it, anyways.

Any ideas on how to make it work again?