crash trying to change a star rating

I was just adjusting my star rating for missile command and got the error:

Object reference not set to an instance of an object.

App: LaunchBox Version: 8.5 Type: System.NullReferenceException Site: Void (<>c__DisplayClass220_1) Source: LaunchBox.Next

at (<>c__DisplayClass220_1 ) at Unbroken.LaunchBox.Desktop.Next.ViewModels.GameDetailsViewModel.<>c__DisplayClass220_1.<LoadStarRatingGrid>b__9() at System.Windows.Threading.DispatcherOperation.InvokeDelegateCore() at System.Windows.Threading.DispatcherOperation.InvokeImpl() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Windows.Threading.DispatcherOperation.Wait(TimeSpan timeout) at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherOperation operation, CancellationToken cancellationToken, TimeSpan timeout) at System.Windows.Threading.Dispatcher.Invoke(Action callback, DispatcherPriority priority, CancellationToken cancellationToken, TimeSpan timeout) at System.Windows.Threading.Dispatcher.Invoke(Action callback, DispatcherPriority priority) at (Action , DispatcherPriority ) at Unbroken.LaunchBox.Wpf.Threading.Invoke(Action callback, DispatcherPriority priority) at (GameDetailsViewModel , Object , MouseEventArgs ) at Unbroken.LaunchBox.Desktop.Next.ViewModels.GameDetailsViewModel.<LoadStarRatingGrid>b__220_1(Object sender, MouseEventArgs args) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.ReverseInheritProperty.FirePropertyChangeInAncestry(DependencyObject element, Boolean oldValue, DeferredElementTreeState treeState, Action2 originChangedAction) at System.Windows.ReverseInheritProperty.FirePropertyChangeInAncestry(DependencyObject element, Boolean oldValue, DeferredElementTreeState treeState, Action2 originChangedAction) at System.Windows.ReverseInheritProperty.OnOriginValueChanged(DependencyObject oldOrigin, DependencyObject newOrigin, IList1 otherOrigins, DeferredElementTreeState& oldTreeState, Action2 originChangedAction) at System.Windows.Input.MouseDevice.ChangeMouseOver(IInputElement mouseOver, Int32 timestamp) at System.Windows.Input.MouseDevice.PreNotifyInput(Object sender, NotifyInputEventArgs e) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Recent Log:

12:06:09 AM Music.Pause Start 12:06:09 AM Music.Prepare Start 12:06:09 AM Music.Kill Start 12:06:09 AM Music.Kill Finished 12:06:09 AM Music.NotifyTrackList Start 12:06:09 AM Music.NotifyTrackList Invoke WPF 12:06:21 AM Music.Pause Start 12:06:21 AM Music.Prepare Start 12:06:21 AM Music.Kill Start 12:06:21 AM Music.Kill Finished 12:06:21 AM Music.NotifyTrackList Start 12:06:21 AM Music.NotifyTrackList Invoke WPF 12:06:27 AM Music.Pause Start 12:06:27 AM Music.Prepare Start 12:06:27 AM Music.Kill Start 12:06:27 AM Music.Kill Finished 12:06:27 AM Music.NotifyTrackList Start 12:06:27 AM Music.NotifyTrackList Invoke WPF 12:06:42 AM Music.Pause Start 12:06:42 AM Music.Prepare Start 12:06:42 AM Music.Kill Start 12:06:42 AM Music.Kill Finished 12:06:42 AM Music.NotifyTrackList Start 12:06:42 AM Music.NotifyTrackList Invoke WPF 12:07:12 AM Music.Pause Start 12:07:12 AM Music.Prepare Start 12:07:12 AM Music.Kill Start 12:07:12 AM Music.Kill Finished 12:07:12 AM Music.NotifyTrackList Start 12:07:12 AM Music.NotifyTrackList Invoke WPF 12:07:55 AM Music.Pause Start 12:07:55 AM Music.Prepare Start 12:07:55 AM Music.Kill Start 12:07:55 AM Music.Kill Finished 12:07:55 AM Music.NotifyTrackList Start 12:07:55 AM Music.NotifyTrackList Invoke WPF 12:08:12 AM Music.Pause Start 12:08:12 AM Music.Prepare Start 12:08:12 AM Music.Kill Start 12:08:12 AM Music.Kill Finished 12:08:12 AM Music.NotifyTrackList Start 12:08:12 AM Music.NotifyTrackList Invoke WPF 12:08:20 AM Music.Pause Start 12:08:20 AM Music.Prepare Start 12:08:20 AM Music.Kill Start 12:08:20 AM Music.Kill Finished 12:08:20 AM Music.NotifyTrackList Start 12:08:20 AM Music.NotifyTrackList Invoke WPF 12:08:37 AM Music.Pause Start 12:08:37 AM Music.Prepare Start 12:08:37 AM Music.Kill Start 12:08:37 AM Music.Kill Finished 12:08:37 AM Music.NotifyTrackList Start 12:08:37 AM Music.NotifyTrackList Invoke WPF 12:09:22 AM Music.Prepare Start 12:09:22 AM Music.Kill Start 12:09:22 AM Music.Kill Finished 12:09:22 AM Music.NotifyTrackList Start 12:09:22 AM Music.NotifyTrackList Invoke WPF 12:09:25 AM Music.Pause Start 12:09:25 AM Music.Prepare Start 12:09:25 AM Music.Kill Start 12:09:25 AM Music.Kill Finished 12:09:25 AM Music.NotifyTrackList Start 12:09:25 AM Music.NotifyTrackList Invoke WPF 12:09:53 AM Music.Pause Start 12:09:53 AM Music.Prepare Start 12:09:53 AM Music.Kill Start 12:09:53 AM Music.Kill Finished 12:09:53 AM Music.NotifyTrackList Start 12:09:53 AM Music.NotifyTrackList Invoke WPF 12:10:13 AM Music.Pause Start 12:10:13 AM Music.Prepare Start 12:10:13 AM Music.Kill Start 12:10:13 AM Music.Kill Finished 12:10:13 AM Music.NotifyTrackList Start 12:10:13 AM Music.NotifyTrackList Invoke WPF 12:10:20 AM Exception

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