Unreal crashes after following this lecture

[Kevin-Brandon]

Here is the photos and code

// K-B 2021


#include "UPGAIController.h"
#include "Kismet/GameplayStatics.h"
#include "BehaviorTree/BlackboardComponent.h"


void AUPGAIController::BeginPlay()
{
	Super::BeginPlay();

	if (AIBehavior != nullptr)
	{
		RunBehaviorTree(AIBehavior);

		//declarations:
			APawn* PlayerPawn = UGameplayStatics::GetPlayerPawn(GetWorld(), 0);

		GetBlackboardComponent()->SetValueAsVector(TEXT("StartLocation"), GetPawn()->GetActorLocation());
	}

}

void AUPGAIController::Tick(float DeltaSeconds)
{
	Super::Tick(DeltaSeconds);

	//declarations:
		APawn* PlayerPawn = UGameplayStatics::GetPlayerPawn(GetWorld(), 0);

	if (LineOfSightTo(PlayerPawn))
	{
		GetBlackboardComponent()->SetValueAsVector(TEXT("PlayerLocation"), PlayerPawn->GetActorLocation());
		GetBlackboardComponent()->SetValueAsVector(TEXT("LastKnownPlayerLocation"), PlayerPawn->GetActorLocation());
	}
	else
	{
		GetBlackboardComponent()->ClearValue(TEXT("PlayerLocation"));
	}
}	

[DanM]

Did you set “AIBehavior” in the blueprint? What is line 38?