NullReferenceException: 未将对象引用设置到对象的实例。
StackTrace:
   在 Quicker.Utilities.AppHelper.RunOnUiThread(Boolean waiteToComplete, Action acton, DispatcherPriority dispatcherPriority)
   在 Quicker.View.PopupWindow.fI6GxYQK0aC(Object  , ConnectionStatusChangedEventArgs  )
   在 Quicker.Domain.Push.PushClient.UjbQ2GfmHU9(PushConnectionState value)
   在 Quicker.Domain.Push.PushClient.HjlQqF2199H(PushConnectionState  , String  , String  )
   在 Quicker.Domain.Push.PushClient.ypkQqjF6kSj()
   在 Quicker.Domain.Push.PushClient.upiQqmf7o7q(Object  )
   在 System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   在 System.Threading.TimerQueueTimer.CallCallback()
   在 System.Threading.TimerQueueTimer.Fire()
   在 System.Threading.TimerQueue.FireNextTimers()