got this, I have recently installed Bezels Project

[Johan Bunger]

Cannot set Visibility to Visible or call Show, ShowDialog, Close, or WindowInteropHelper.EnsureHandle while a Window is closing.

App: LaunchBox
Version: 10.1
Type: System.InvalidOperationException
Site: Void VerifyNotClosing()
Source: PresentationFramework

at System.Windows.Window.VerifyNotClosing()
at System.Windows.Window.InternalClose(Boolean shutdown, Boolean ignoreCancel)
at (MainStartupView )
at Unbroken.LaunchBox.Windows.Views.MainStartupView.<CloseAndDispose>b__21_0()
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.Windows.Threading.Invoke(Action callback, DispatcherPriority priority)
at Unbroken.LaunchBox.Windows.Views.MainStartupView.CloseAndDispose()
at (MainStartupView )
at Unbroken.LaunchBox.Windows.Views.MainStartupView.<FocusGame>b__16_2()
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.Windows.Threading.Invoke(Action callback, DispatcherPriority priority)
at Unbroken.LaunchBox.Windows.Views.MainStartupView.<FocusGame>b__16_0()
at Unbroken.LaunchBox.Windows.Threading.<>c__DisplayClass0_0.<Queue>b__0(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()

Recent Log:

2:40:05 PM Music.NotifyTrackList Start
2:40:05 PM Music.NotifyTrackList Invoke WPF
2:40:05 PM Music.Pause Start
2:40:06 PM Music.Pause Start
2:40:19 PM Music.Pause Start
2:40:19 PM Music.Prepare Start
2:40:19 PM Music.Kill Start
2:40:19 PM Music.Kill Finished
2:40:19 PM Music.NotifyTrackList Start
2:40:19 PM Music.NotifyTrackList Invoke WPF
2:40:19 PM Music.Pause Start
2:40:19 PM Music.Prepare Start
2:40:19 PM Music.Kill Start
2:40:19 PM Music.Kill Finished
2:40:19 PM Music.NotifyTrackList Start
2:40:19 PM Music.NotifyTrackList Invoke WPF
2:40:21 PM Music.Pause Start
2:40:22 PM Music.Pause Start
2:40:29 PM Music.Play Start
2:40:29 PM Music.Kill Start
2:40:29 PM Music.Kill Finished
2:40:29 PM Music.Play Empty Music Path
2:40:29 PM Music.NotifyTrackList Start
2:40:29 PM Music.NotifyTrackList Invoke WPF
2:40:30 PM Music.Pause Start
2:40:30 PM Music.Prepare Start
2:40:30 PM Music.Kill Start
2:40:30 PM Music.Kill Finished
2:40:30 PM Music.NotifyTrackList Start
2:40:30 PM Music.NotifyTrackList Invoke WPF
2:40:31 PM Music.Pause Start
2:40:32 PM Music.Pause Start
2:40:38 PM Music.Pause Start
2:40:38 PM Music.Prepare Start
2:40:38 PM Music.Kill Start
2:40:38 PM Music.Kill Finished
2:40:38 PM Music.NotifyTrackList Start
2:40:38 PM Music.NotifyTrackList Invoke WPF
2:40:39 PM Music.Pause Start
2:40:39 PM Music.Prepare Start
2:40:39 PM Music.Kill Start
2:40:39 PM Music.Kill Finished
2:40:39 PM Music.NotifyTrackList Start
2:40:39 PM Music.NotifyTrackList Invoke WPF
2:40:40 PM Music.Pause Start
2:40:40 PM Music.Pause Start
2:40:50 PM Music.Play Start
2:40:50 PM Music.Kill Start
2:40:50 PM Music.Kill Finished
2:40:50 PM Music.Play Empty Music Path
2:40:50 PM Music.NotifyTrackList Start
2:40:50 PM Music.NotifyTrackList Invoke WPF
2:40:52 PM Music.Pause Start
2:40:52 PM Music.Prepare Start
2:40:52 PM Music.Kill Start
2:40:52 PM Music.Kill Finished
2:40:52 PM Music.NotifyTrackList Start
2:40:52 PM Music.NotifyTrackList Invoke WPF
2:40:58 PM Music.Pause Start
2:40:59 PM Music.Pause Start
2:41:26 PM Music.Pause Start
2:41:26 PM Music.Prepare Start
2:41:26 PM Music.Kill Start
2:41:26 PM Music.Kill Finished
2:41:26 PM Music.NotifyTrackList Start
2:41:26 PM Music.NotifyTrackList Invoke WPF
2:41:26 PM Music.Pause Start
2:41:26 PM Music.Prepare Start
2:41:26 PM Music.Kill Start
2:41:26 PM Music.Kill Finished
2:41:26 PM Music.NotifyTrackList Start
2:41:26 PM Music.NotifyTrackList Invoke WPF
2:41:27 PM Music.Pause Start
2:41:27 PM Music.Prepare Start
2:41:27 PM Music.Kill Start
2:41:27 PM Music.Kill Finished
2:41:27 PM Music.NotifyTrackList Start
2:41:27 PM Music.NotifyTrackList Invoke WPF
2:41:28 PM Music.Pause Start
2:41:28 PM Music.Pause Start
2:41:34 PM Exception