SetScalarParameterValue Access Violation

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This is how I setup it in actor containing StaticMeshComponent.

Header:

UPROPERTY(EditDefaultsOnly, meta = (Category = "Mesh"))
	UStaticMeshComponent* StaticMeshComponent;

UPROPERTY()
	UStaticMesh* DefaultMesh;

UPROPERTY()
	UMaterialInterface* DefaultMaterial;

UPROPERTY()
	UMaterialInstanceDynamic* MID;

CPP Constructor:

static ConstructorHelpers::FObjectFinder<UStaticMesh> MeshObj(TEXT("/Meshes/SM_Plane.SM_Plane"));
static ConstructorHelpers::FObjectFinder<UMaterialInterface> MaterialObj(TEXT("/Materials/M_Base.M_Base"));
DefaultMesh = MeshObj.Object;
DefaultMaterial = MaterialObj.Object;

StaticMeshComponent->SetStaticMesh(DefaultMesh);
StaticMeshComponent->SetMaterial(0, DefaultMaterial);

CPP function that creates dynamic MI:

	MID = StaticMeshComponent->CreateDynamicMaterialInstance(0, DefaultMaterial);
	MID->SetScalarParameterValue(TEXT("Param"), 0.0f);