Editor crashes when i use AddForceAtLocation

Development Programming & Scripting C++
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1

code here:

void UTankTrack::SetThrottle(float Throttle) 
{	
	auto ForceApplied = GetForwardVector() * Throttle * TrackMaxDrivingForce;
	auto ForceLoc = GetComponentLocation();
	UPrimitiveComponent* TankRoot = Cast<UPrimitiveComponent>(GetOwner()->GetRootComponent());
	TankRoot->AddForceAtLocation(ForceApplied, ForceLoc);

void UTankMovementComponent::IntendMoveForward(float Throw) 
{
	UE_LOG(LogTemp, Warning, TEXT("Intend move forward throw: %f"), Throw);
	LeftTrack->SetThrottle(Throw);
	RightTrack->SetThrottle(Throw);
}

UCLASS(ClassGroup = (Custom), meta = (BlueprintSpawnableComponent))
class TTANKGAMEAGAIN_API UTankMovementComponent : public UNavMovementComponent
{

	GENERATED_BODY()

private:
	UFUNCTION(BlueprintCallable, Category = Input)
		void IntendMoveForward(float Throw);
	UFUNCTION(BlueprintCallable, Category = Setup)
		void Initialise(UTankTrack* LeftTrackToSet, UTankTrack* RightTrackToSet);
	UFUNCTION(BluePrintCallable, Category = Input)
		void IntendTurnRight(float Throw);
	UTankTrack* LeftTrack = nullptr;
	UTankTrack* RightTrack = nullptr;
	
};

Crash Report:
Unhandled exception

UE4Editor_tTankGameAgain_9550!UTankTrack::SetThrottle() [C:\Users\winte\Documents\Unreal Projects\TonkGameUE4\tTankGameAgain\Source\tTankGameAgain\Private\TankTrack.cpp:13]
UE4Editor_tTankGameAgain_9550!UTankMovementComponent::IntendMoveForward() [C:\Users\winte\Documents\Unreal Projects\TonkGameUE4\tTankGameAgain\Source\tTankGameAgain\Private\TankMovementComponent.cpp:11]
UE4Editor_tTankGameAgain_9550!UTankMovementComponent::execIntendMoveForward() [C:\Users\winte\Documents\Unreal Projects\TonkGameUE4\tTankGameAgain\Source\tTankGameAgain\Public\TankMovementComponent.h:16]
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll

why is this happen`
im new to UE4.
Thanks for your adviŅe