System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.TypeInitializationException: An exception was thrown by the type initializer for MonoDevelop.GtkCore.GuiBuilder.GuiBuilderService ---> System.TypeInitializationException: An exception was thrown by the type initializer for Stetic.Registry ---> System.ArgumentException: <enum> node for Gdk.WindowTypeHint is missing some values
  at Stetic.EnumDescriptor..ctor (System.Xml.XmlElement elem) [0x00000] 
  at Stetic.WidgetLibrary.Load (System.Xml.XmlDocument objects) [0x00000] 
  at Stetic.AssemblyWidgetLibrary.Load () [0x00000] 
  at Stetic.Registry.RegisterWidgetLibrary (Stetic.WidgetLibrary library) [0x00000] 
  at Stetic.Registry..cctor () [0x00000] --- End of inner exception stack trace ---

  at <0x00000> <unknown method>
  at Stetic.Project..ctor () [0x00000] 
  at MonoDevelop.GtkCore.GuiBuilder.GuiBuilderService..cctor () [0x00000] --- End of inner exception stack trace ---

  at <0x00000> <unknown method>
  at MonoDevelop.GtkCore.GuiBuilder.GuiBuilderPalettePad..ctor () [0x00000] 
  at <0x00000> <unknown method>
  at (wrapper managed-to-native) System.Reflection.MonoCMethod:InternalInvoke (object,object[])
  at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] --- End of inner exception stack trace ---

  at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] 
  at System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] 
  at System.Reflection.ConstructorInfo.Invoke (System.Object[] parameters) [0x00000] 
  at System.Activator.CreateInstance (System.Type type, Boolean nonPublic) [0x00000] 
  at System.Activator.CreateInstance (System.Type type) [0x00000] 
  at MonoDevelop.Core.AddIns.AddIn.CreateObject (System.String className) [0x00000] 
  at MonoDevelop.Ide.Codons.PadCodon.CreatePad () [0x00000] 
  at MonoDevelop.Ide.Codons.PadCodon.BuildItem (System.Object owner, System.Collections.ArrayList subItems, MonoDevelop.Core.AddIns.ConditionCollection conditions) [0x00000] 
  at MonoDevelop.Core.AddIns.DefaultAddInTreeNode.BuildChildItems (System.Object caller) [0x00000] 
  at MonoDevelop.Core.AddIns.AddInService.GetTreeItems (System.String path, System.Type itemType) [0x00000] 
  at MonoDevelop.Ide.Gui.DefaultWorkbench.InitializeLayout (IWorkbenchLayout workbenchLayout) [0x00000] 
  at MonoDevelop.Ide.Gui.Workbench.Initialize (IProgressMonitor monitor) [0x00000] 
  at MonoDevelop.Ide.Gui.IdeApp.Initialize (IProgressMonitor monitor) [0x00000] 
  at MonoDevelop.Ide.Gui.IdeStartup.Run (System.String[] args) [0x00000]