Attaching one component to another crash: 'template mismatch during attachment'

[HateDread]

@;146517

Hey try.

UPROPERTY(VisibleAnywhere, Category = "MyComponents")
TSubobjectPtr<UBoxComponent> SpawnBoxComponent;

AShipStart::AShipStart(const class FPostConstructInitializeProperties& PCIP)
	: Super(PCIP)
{
	SpawnBoxComponent = PCIP.CreateDefaultSubobject<UBoxComponent>(this, TEXT("Spawn Box"));
        if (SpawnBoxComponent )
        {
	      SpawnBoxComponent->AttachParent = RootComponent;
	      SpawnBoxComponent->SetWorldScale3D(FVector(200, 200, 200));
        }
}

Same error. When I open the editor/level:

Error Failed import: BoxComponent /Game/Blueprints/Core/BP_ShipStart.Default__BP_ShipStart_C:Spawn Box in /Game/Maps/Default_Map

When I hit play, and crash:

Ensure condition failed: false [File:F:\P4_BH_Home\UnrealEngine\Engine\Source\Runtime\Engine\Private\SceneComponent.cpp] [Line: 744]
Template Mismatch during attachment. Attaching instanced component to template component. Parent ‘CollisionCapsule’ Self ‘Spawn Box’
UE4Editor.exe has triggered a breakpoint.