Facebook登錄按鈕引發錯誤，說我無法登錄

我創建了一個按鈕，讓我的用戶通過Facebook與Parse一起登錄。Facebook登錄按鈕引發錯誤，說我無法登錄

我正在使用iOS 9.1 beta和Xcode 7 beta 3. 目前這是我的IBAction的swift代碼。 Facebook按鈕有點作用，但實際上並沒有讓我登錄，留下了下面圖片中顯示的錯誤。不確定爲什麼這是因爲我的pList與Facebook iOS9程序都是最新的。

視圖控制器代碼：

} 

@IBAction func fbLoginClick(sender: AnyObject) { 

    PFFacebookUtils.logInInBackgroundWithReadPermissions(permissions) { (user: PFUser?, error: NSError?) -> Void in 

     if user == nil { 

      NSLog("Uh oh. The user cancelled the Facebook login.") 

     } else if user!.isNew { 

      NSLog("User signed up and logged in through Facebook! \(user)") 

     } else { 

      NSLog("User logged in through Facebook! \(user)") 

     } 

    } 
} 
}

應用程序委託代碼：

@UIApplicationMain 
class AppDelegate: UIResponder, UIApplicationDelegate { 


var window: UIWindow? 


func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { 

    Parse.enableLocalDatastore() 

    Parse.setApplicationId("Parse ID", 
     clientKey: "Client Key") 

    PFAnalytics.trackAppOpenedWithLaunchOptionsInBackground(launchOptions, block: nil) 
    PFFacebookUtils.initializeFacebookWithApplicationLaunchOptions(launchOptions) 

} 

func applicationWillResignActive(application: UIApplication) { 

} 

func applicationDidEnterBackground(application: UIApplication) { 

} 

func applicationDidBecomeActive(application: UIApplication) { 

} 

func applicationDidBecomeActive(application: UIApplication) { 

} 

func applicationWillTerminate(application: UIApplication) { 

} 

func application(application: UIApplication, 
openURL url: NSURL, 
sourceApplication: String?, 
annotation: AnyObject?) -> Bool { 
    return FBSDKApplicationDelegate.sharedInstance().application(application, 
     openURL: url, 
     sourceApplication: sourceApplication, 
     annotation: annotation)

}