ADK crash

After the last update I keep getting a crash. Does any one know how to fix this?

Fatal error: [File:H:\SVN_Ark\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectBaseUtility.cpp] [Line: 262]
IsA(NULL) cannot yield meaningful results

VERSION: 257.42
KERNELBASE.dll!UnknownFunction (0x00007ff868613c58) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff8375e72fd) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff8374ce0cf) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ff85804e41d) + 0 bytes [UnknownFile:0]
UE4Editor-ShooterGame.dll!APrimalStructure::GetSnapToLocation() (0x00007ff82b5ace68) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructure.cpp:2199]
UE4Editor-ShooterGame.dll!APrimalStructure::GetPlacingGroundLocation() (0x00007ff82b5a8b0a) + 62 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructure.cpp:2928]
UE4Editor-ShooterGame.dll!APrimalStructure::IsAllowedToBuild() (0x00007ff82b5b33d1) + 41 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructure.cpp:1112]
UE4Editor-ShooterGame.dll!APrimalStructure::TickPlacingStructure() (0x00007ff82b5c05ca) + 197 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructure.cpp:978]
UE4Editor-ShooterGame.dll!APrimalStructurePlacer::BeginState() (0x00007ff82b5fb134) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructureplacer.cpp:114]
UE4Editor-ShooterGame.dll!APrimalStructurePlacer::StartPlacingStructure() (0x00007ff82b5fda43) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructureplacer.cpp:184]
UE4Editor-ShooterGame.dll!APrimalStructurePlacer::StartPlacingStructure() (0x00007ff82b5fda9b) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructureplacer.cpp:147]
UE4Editor-ShooterGame.dll!UPrimalItem::LocalUse() (0x00007ff82b54edf5) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalitem.cpp:2423]
UE4Editor-ShooterGame.dll!UPrimalInventoryComponent::LocalUseItemSlot() (0x00007ff82b521032) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalinventorycomponent.cpp:2679]
UE4Editor-ShooterGame.dll!AShooterPlayerController::OnUseItemSlot<0>() (0x00007ff82b78f254) + 42 bytes [h:\svn_ark\projects\shootergame\source\shootergame\classes\shooterplayercontroller.h:840]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff834e2aa82) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff8344a5b3e) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff8344bb870) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff8344a1b5b) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff8344babc0) + 0 bytes [UnknownFile:0]
UE4Editor-ShooterGame.dll!AShooterPlayerController::TickActor() (0x00007ff82b7cbd75) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\shooterplayercontroller.cpp:2061]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff833fda006) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff8346dbd56) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff8346e6ab1) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff8373a66fa) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff8373a6a5d) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff8373d1860) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff83430a549) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff83470e565) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff8347150b6) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff834381836) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff83438b74b) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff8319f1d84) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff831e67cd6) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff6f7c4ab85) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff6f7c3fa5f) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff6f7c3faca) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff6f7c4c240) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff6f7c4d189) + 0 bytes [UnknownFile:0]
KERNEL32.DLL!UnknownFunction (0x00007ff869ed8364) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ff86bfe70d1) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ff86bfe70d1) + 0 bytes [UnknownFile:0]

i did a reinstall and i still get the problem

Fatal error: [File:H:\SVN_Ark\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectBaseUtility.cpp] [Line: 262]
IsA(NULL) cannot yield meaningful results

VERSION: 257.42
KERNELBASE.dll!UnknownFunction (0x00007ff868613c58) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff8490272fd) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff848f0e0cf) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ff84414e41d) + 0 bytes [UnknownFile:0]
UE4Editor-ShooterGame.dll!APrimalStructure::GetSnapToLocation() (0x00007ff82b78ce68) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructure.cpp:2199]
UE4Editor-ShooterGame.dll!APrimalStructure::GetPlacingGroundLocation() (0x00007ff82b788b0a) + 62 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructure.cpp:2928]
UE4Editor-ShooterGame.dll!APrimalStructure::IsAllowedToBuild() (0x00007ff82b7933d1) + 41 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructure.cpp:1112]
UE4Editor-ShooterGame.dll!APrimalStructure::TickPlacingStructure() (0x00007ff82b7a05ca) + 197 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructure.cpp:978]
UE4Editor-ShooterGame.dll!APrimalStructurePlacer::BeginState() (0x00007ff82b7db134) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructureplacer.cpp:114]
UE4Editor-ShooterGame.dll!APrimalStructurePlacer::StartPlacingStructure() (0x00007ff82b7dda43) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructureplacer.cpp:184]
UE4Editor-ShooterGame.dll!APrimalStructurePlacer::StartPlacingStructure() (0x00007ff82b7dda9b) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalstructureplacer.cpp:147]
UE4Editor-ShooterGame.dll!UPrimalItem::LocalUse() (0x00007ff82b72edf5) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalitem.cpp:2423]
UE4Editor-ShooterGame.dll!UPrimalInventoryComponent::LocalUseItemSlot() (0x00007ff82b701032) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\primalinventorycomponent.cpp:2679]
UE4Editor-ShooterGame.dll!AShooterPlayerController::OnUseItemSlot<1>() (0x00007ff82b96e159) + 45 bytes [h:\svn_ark\projects\shootergame\source\shootergame\classes\shooterplayercontroller.h:840]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff8311faa82) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff830875b3e) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff83088b870) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff830871b5b) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff83088abc0) + 0 bytes [UnknownFile:0]
UE4Editor-ShooterGame.dll!AShooterPlayerController::TickActor() (0x00007ff82b9abd75) + 0 bytes [h:\svn_ark\projects\shootergame\source\shootergame\private\shooterplayercontroller.cpp:2061]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff8303aa006) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff830aabd56) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff830ab6ab1) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff848de66fa) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff848de6a5d) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff848e11860) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff8306da549) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff830ade565) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff830ae50b6) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff830751836) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff83075b74b) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff835761d84) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff835bd7cd6) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff69905ab85) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff69904fa5f) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff69904faca) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff69905c240) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff69905d189) + 0 bytes [UnknownFile:0]
KERNEL32.DLL!UnknownFunction (0x00007ff869ed8364) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ff86bfe70d1) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ff86bfe70d1) + 0 bytes [UnknownFile:0]