NullReferenceException: オブジェクト参照がオブジェクト インスタンスに設定されていません。
StackTrace:
   場所 IntelliTools.View.Clipboard.ClipboardOrbCoordinator.SyncOrbPanelOpenStateIfPanelHidden()
   場所 IntelliTools.View.Clipboard.ClipboardOrbCoordinator.EndCompanionSuppression()
   場所 IntelliTools.Domain.Manager.SettingManager.OnSettingWindowIsVisibleChanged(Object sender, DependencyPropertyChangedEventArgs e)
   場所 System.Windows.UIElement.RaiseDependencyPropertyChanged(EventPrivateKey key, DependencyPropertyChangedEventArgs args)
   場所 System.Windows.UIElement.OnIsVisibleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   場所 System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   場所 System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   場所 System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   場所 System.Windows.UIElement.UpdateIsVisibleCache()
   場所 System.Windows.UIElement.OnVisibilityChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   場所 System.Windows.PropertyChangedCallback.Invoke(DependencyObject d, DependencyPropertyChangedEventArgs e)
   場所 System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   場所 System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   場所 System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   場所 System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   場所 System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   場所 System.Windows.Window.UpdateVisibilityProperty(Visibility value)
   場所 System.Windows.Window.Hide()
   場所 System.Windows.Window.OnClosing(CancelEventArgs e)
   場所 System.Windows.Window.WmClose()
   場所 System.Windows.Window.WindowFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   場所 System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   場所 MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   場所 MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   場所 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   場所 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)