Exception at startup

[nosami]

  at System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic) [0x00039] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-02/external/bockbuild/builds/mono-x64/mcs/class/referencesource/mscorlib/system/activator.cs:201 
  at Mono.Addins.RuntimeAddin.CreateInstance (System.String typeName, System.Boolean throwIfNotFound) [0x00014] in /Users/builder/data/lanes/5810/6a86203d/source/monodevelop/main/external/mono-addins/Mono.Addins/Mono.Addins/RuntimeAddin.cs:431 
  at MonoDevelop.Ide.Codons.PadCodon.CreatePad () [0x0000f] in /Users/builder/data/lanes/5810/6a86203d/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Codons/PadCodon.cs:169 
  at MonoDevelop.Ide.Codons.PadCodon.InitializePadContent (MonoDevelop.Ide.Gui.IPadWindow window) [0x00008] in /Users/builder/data/lanes/5810/6a86203d/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Codons/PadCodon.cs:90 
  at MonoDevelop.Ide.Gui.PadWindow.CreateContent () [0x00008] in /Users/builder/data/lanes/5810/6a86203d/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui/IPadContainer.cs:276 
  at MonoDevelop.Ide.Gui.PadWindow.get_Content () [0x00000] in /Users/builder/data/lanes/5810/6a86203d/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui/IPadContainer.cs:158 
  at MonoDevelop.Ide.Gui.Pad.get_Content () [0x00000] in /Users/builder/data/lanes/5810/6a86203d/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui/Pad.cs:61 
  at XSVim.treeViewPads+getTreeViewPads@15-1.Invoke (MonoDevelop.Ide.Gui.Pad pad) [0x00001] in <59bbbbbee4ff76b6a7450383bebbbb59>:0 
  at Microsoft.FSharp.Primitives.Basics.List.mapToFreshConsTail[a,b] (Microsoft.FSharp.Collections.FSharpList`1[T] cons, Microsoft.FSharp.Core.FSharpFunc`2[T,TResult] f, Microsoft.FSharp.Collections.FSharpList`1[T] x) [0x00019] in <5893d081904cf4daa745038381d09358>:0 
  at Microsoft.FSharp.Primitives.Basics.List.map[T,TResult] (Microsoft.FSharp.Core.FSharpFunc`2[T,TResult] mapping, Microsoft.FSharp.Collections.FSharpList`1[T] x) [0x0004d] in <5893d081904cf4daa745038381d09358>:0 
  at Microsoft.FSharp.Collections.ListModule.Map[T,TResult] (Microsoft.FSharp.Core.FSharpFunc`2[T,TResult] mapping, Microsoft.FSharp.Collections.FSharpList`1[T] list) [0x00001] in <5893d081904cf4daa745038381d09358>:0 
  at XSVim.treeViewPads.getTreeViewPads () [0x00023] in <59bbbbbee4ff76b6a7450383bebbbb59>:0 
  at XSVim.treeViewPads.initialize () [0x00015] in <59bbbbbee4ff76b6a7450383bebbbb59>:0 
  at XSVim.XSVim.Initialize () [0x00001] in <59bbbbbee4ff76b6a7450383bebbbb59>:0