Facebook SDK iOS error 2

Question

I'm trying to log into facebook with their API using

[FBSession openActiveSessionWithReadPermissions:permissions
                                   allowLoginUI:YES
                              completionHandler:^(FBSession *session, FBSessionState state, NSError *error) {
                                                     [self sessionStateChanged:session state:state error:error];
                                                 }]

The problem I'm having is in iOS 6.x when the device has a facebook account linked in the settings app it fails to log in. The error it gives is the seemingly one-size-fits-all error 2. This is the only case where it fails and I can't understand why. What is a solution to let me log in while an account is linked?

Answer 1

check that your permissions array does not contain the offline_access permission. this permission is now deprecated and has been known to cause login to fail. i previously searched stack overflow and found this answer. you'll also need to go into Settings -> Facebook and switch the permission on the Allowed Apps to On.