Creating an Array of actors c++ not working

Development Programming & Scripting C++
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I have a Smart Object that is completely working in a class I can drop the actor in the scene and it works fine.

Now I have a secondary class that needs to make a array of these objects in the scene. Ive tried the following with them all failing in a engine crash:

		TArray<ABuildingModTile*> Column;

	FActorSpawnParameters SpawnInfo;
	ABuildingModTile* someItem = GetWorld()->SpawnActor<ABuildingModTile>(GetClass(), SpawnInfo);
	Column.Add(someItem);

Column.Add(ObjectInitializer.CreateDefaultSubobject < ABuildingModTile >(this, TEXT("BuildingModTile")));

I’m not understanding something,