Has anyone else had this problem? I'm getting this error when trying to authorize a user via FB, I think I've isolated it only when a user has installed the Facebook app:
fb_our_appID://authorize#error=unknown%5Ferror
If you delete the FB app from the user's phone, our app will then try to authenticate via Safari, and everything works fine.
Thanks so much.
Yup, we were getting this as well.
It occurs when your bundle identifier does not match the one configured as part of your facebook application. Copy your bundle-id from your plist, and update the iOS Bundle ID value on facebook
https://developers.facebook.com/apps/_YOUR_APP_ID_/summary
PS: Check out facebook.stackoverflow.com for good facebook help.