ark dev kit crashing and freezing

Fatal error: [File:H:\SVN_Ark\Engine\Source\Runtime\Engine\Private\GlobalShader.cpp] [Line: 635]
Failed to compile global shader TGenerateClutterCS

VERSION: 0.0
KERNELBASE.dll!UnknownFunction (0x00007ffebbc795fc) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffea1b7614d) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffea1a5d3cf) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffe9179eb7f) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffe922f7491) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffe922f6045) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe9026d7c4) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe9025402d) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe9023b6c3) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe9051329d) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe9026515a) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe90264e3b) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe9057a433) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe9050ec00) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff602d0f99d) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff602d0faca) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff602d1c240) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff602d1d189) + 0 bytes [UnknownFile:0]
KERNEL32.DLL!UnknownFunction (0x00007ffebcc313d2) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffebe8554e4) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffebe8554e4) + 0 bytes [UnknownFile:0]