I've noticed over the last few days that almost every app I try to login with or authenticate with Facebook does not work. When I try to sign up for an app with Facebook I get, "Sorry, this feature isn't available right now. An error occurred while processing this request. Please try again later." I haven't made any changes to my Facebook settings and have verified that the app does have permission in settings to access Facebook. Is this a setting somewhere that I have to change or is there a fix for this? I also tried removing and reinstalling Facebook on my iPhone. I tried logging out of imgur and logging in with Facebook through Safari on my iPad and it worked, so it looks like it works there, just not on my iPhone for any app for some reason.