CRASH: 4.6.1 When running a dedicated server

Crash Report:
[Link Removed]

<unknown module>! KERNELBASE!RaiseException()
<unknown module>! UE4Editor_Core!FOutputDeviceWindowsError::Serialize()
<unknown module>! UE4Editor_Core!FMsg::Logf__VA()
<unknown module>! UE4Editor_CoreUObject!CastLogError()
<unknown module>! UE4Editor_BlueprintGraph!CastChecked<UBlueprint,UObject>()
<unknown module>! UE4Editor_BlueprintGraph!UK2Node_Variable::CreatePinForVariable()
<unknown module>! UE4Editor_BlueprintGraph!UK2Node_VariableGet::ReallocatePinsDuringReconstruction()
<unknown module>! UE4Editor_BlueprintGraph!UK2Node::ReconstructNode()
<unknown module>! UE4Editor_BlueprintGraph!UEdGraphSchema_K2::ReconstructNode()
<unknown module>! UE4Editor_UnrealEd!FBlueprintEditorUtils::RefreshAllNodes()
<unknown module>! UE4Editor_UnrealEd!FBlueprintEditorUtils::RegenerateBlueprintClass()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::RegenerateBlueprintClass()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::CreateExport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::IndexToObject()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::operator<<()
<unknown module>! UE4Editor_CoreUObject!UClass::Serialize()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::Preload()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::CreateExport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::IndexToObject()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::CreateExport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::CreateExportAndPreload()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::LoadAllObjects()
<unknown module>! UE4Editor_CoreUObject!LoadPackageInternal()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::VerifyImport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::VerifyImport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::CreateImport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::IndexToObject()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::operator<<()
<unknown module>! UE4Editor_CoreUObject!UObjectProperty::SerializeItem()
<unknown module>! UE4Editor_CoreUObject!FPropertyTag::SerializeTaggedProperty()
<unknown module>! UE4Editor_CoreUObject!UStruct::SerializeTaggedProperties()
<unknown module>! UE4Editor_CoreUObject!UClass::SerializeDefaultObject()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::Preload()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::RegenerateBlueprintClass()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::CreateExport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::IndexToObject()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::operator<<()
<unknown module>! UE4Editor_CoreUObject!UClass::Serialize()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::Preload()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::CreateExport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::IndexToObject()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::CreateExport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::CreateExportAndPreload()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::LoadAllObjects()
<unknown module>! UE4Editor_CoreUObject!LoadPackageInternal()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::VerifyImport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::VerifyImport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::CreateImport()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::IndexToObject()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::operator<<()
<unknown module>! UE4Editor_CoreUObject!UObjectProperty::SerializeItem()
<unknown module>! UE4Editor_CoreUObject!FPropertyTag::SerializeTaggedProperty()
<unknown module>! UE4Editor_CoreUObject!UStruct::SerializeTaggedProperties()
<unknown module>! UE4Editor_CoreUObject!UObject::SerializeScriptProperties()
<unknown module>! UE4Editor_CoreUObject!UObject::Serialize()
<unknown module>! UE4Editor_Engine!AWorldSettings::Serialize()
<unknown module>! UE4Editor_CoreUObject!ULinkerLoad::Preload()
<unknown module>! UE4Editor_CoreUObject!EndLoad()
<unknown module>! UE4Editor_CoreUObject!LoadPackageInternal()
<unknown module>! UE4Editor_Engine!UEngine::LoadMap()
<unknown module>! UE4Editor_Engine!UEngine::Browse()
<unknown module>! UE4Editor_Engine!UGameInstance::StartGameInstance()
<unknown module>! UE4Editor_Engine!UGameEngine::Init()
<unknown module>! UE4Editor!FEngineLoop::Init()
<unknown module>! UE4Editor!GuardedMain()
<unknown module>! UE4Editor!GuardedMainWrapper()
<unknown module>! UE4Editor!WinMain()
<unknown module>! UE4Editor!__tmainCRTStartup()

Cannot reproduce.