Opening the editor (using Ctrl+P) gives the following error:
[EXC 21:06:25.580] NullReferenceException: Object reference not set to an instance of an object
KittopiaTech.UI.Framework.Window.Hide ()
KittopiaTech.UI.Framework.Window.ToggleVisibility ()
KittopiaTech.KittopiaTech.Update ()
Using KSP 1.6.0