Issue creating a 3D Mesh(Access violation)

Development Pipeline & Plugins Editor Scripting
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I was following a tutorial on how to assign a mesh to a staticMesh and I get the following error:

Exception thrown at 0x00007FFD8F47DD5A (UE4Editor-Engine.dll) in UE4Editor.exe: 0xC0000005: Access violation reading location 0x0000000000000098.

static ConstructorHelpers::FObjectFinder<UStaticMesh> CubeAsset(TEXT("/SideScrollerTest/Content/Geometry/Meshes/1M_Cube"));

Whole cpp script:

// Fill out your copyright notice in the Description page of Project Settings.


#include "MyActor.h"
// Sets default values
AMyActor::AMyActor()
{
	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = true;
	UStaticMeshComponent* Cube = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("3D Design"));
	staticMesh->SetupAttachment(RootComponent);
	 static ConstructorHelpers::FObjectFinder<UStaticMesh> CubeAsset(TEXT("/SideScrollerTest/Content/Geometry/Meshes/1M_Cube"));

	if (CubeAsset.Succeeded()){
		staticMesh->SetStaticMesh(CubeAsset.Object);
		staticMesh->SetRelativeLocation(FVector(0.0f, 0.0f, 0.0f));
	staticMesh->SetWorldScale3D(FVector(1.1f));
}
}

// Called when the game starts or when spawned
void AMyActor::BeginPlay()
{
	Super::BeginPlay();
	UE_LOG(LogTemp, Warning, TEXT("Hello World!"));
}

// Called every frame
void AMyActor::Tick(float DeltaTime)
{

	Super::Tick(DeltaTime);

}

P.s I have no idea where to put this, the topics are so vague(Their descriptions are one sentence long, the hell?) that I decided since it’s realtime in the editor that I should put it under editor scripting.