iOS Facebook SDK Error Domain com.facebook.sdk Code 2 and Code 7

I am developing the application which allow user to login via Facebook (using Facebook SDK for it). The error appears when a user has already logged in Facebook in iPhone settings. If not - all work correctly.

NSArray *permissions = [[NSArray alloc] initWithObjects:@"email", nil];
    [FBSession openActiveSessionWithReadPermissions:permissions
                                       allowLoginUI:YES
                                  completionHandler:
     ^(FBSession *session,
       FBSessionState state, NSError *error) {
         [self fbSessionStateChanged:session state:state error:error];
     }];

I've already tried to set permissions as nil array - nothing changed.

The log is:

Error Domain=com.facebook.sdk Code=2 "The operation couldn’t be completed.
(com.facebook.sdk error 2.)" UserInfo=0x1552c6c0 
{com.facebook.sdk:ErrorLoginFailedReason=com.facebook.sdk:SystemLoginDisallowedWithoutError,
com.facebook.sdk:ErrorSessionKey=<FBSession: 0xabe8100, state: FBSessionStateClosedLoginFailed,
loginHandler: 0x0, appID: APPIDHERE, urlSchemeSuffix: ,
tokenCachingStrategy:<FBSessionTokenCachingStrategy: 0x14b8f3d0>,
expirationDate: (null), refreshDate: (null),
attemptedRefreshDate: 0001-12-30 00:00:00 +0000, permissions:(null)>}

Sometimes the error with Code 7 is appears too. I have read almost all topics related to this error.

My steps were:

1. Compare my app id in .plist file with FB bundle id. They are the same!!!
2. My app is not in a sandbox mode!
3. If I change from [FBSession openActiveSessionWithReadPermissions:permissions to [FBSession openActiveSessionWithPermissions:permissions- it works. But it is deprecated.