AvalonDock Using Shift+F10 throws an exception

AvalonDock Using Shift+F10 throws an exception

Hi Evance:

This is an urgent request!

Using xceed.products.wpf.toolkit.full\4.6.23520.1445 nuget pkg
Created simple Xceed AvalonDock sample WPF application
Put focus within Textbox
Click Shift+F10
Exception message: 'Xceed.Wpf.AvalonDock.Layout.LayoutDocument' is not a Visual or Visual3D.

Joe