"Not all control paths return a value" error with *AActor output

Development Programming & Scripting C++
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1

The following function causes a “Not all control paths return a value” error:

const AActor* AMeleeCharacter::FindNearestTarget()
{
	// Local variables for tracing
	const FVector Location = GetActorLocation();
	const TArray<AActor*> ActorsToIgnore;
	FHitResult HitInfo;

	// Trace for nearest target
	const bool TargetFound = UKismetSystemLibrary::SphereTraceSingleByProfile(
		GetWorld(), Location, Location, 1000, "Pawn", false,
		ActorsToIgnore, EDrawDebugTrace::None, HitInfo, true);

	if(TargetFound)
	{
		return HitInfo.GetActor();
	}
}

This is confusing to me, as I thought that was supposed to be a warning for enumerations lacking a default value. Can someone please shed some light on what this error actually means?

2

What if TargetFound is false? What will be the return?

const AActor* AMeleeCharacter::FindNearestTarget()
{
	...

	if(TargetFound)
	{
		return HitInfo.GetActor();
	}
    
    // If TargetFound is false, what does it return?
}
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