How to get actors when game init?

Development Programming & Scripting C++
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1

Trying to get actors in game mode overriden method InitGame but getting access violation error with line uncommented.
What I’m doing wrong?

void AGameGameMode::InitGame(const FString& MapName, const FString& Options, FString& ErrorMessage)
{
	Super::InitGame(MapName, Options, ErrorMessage);

	APlayerController * c = UGameplayStatics::GetPlayerController(GetWorld(), 0);

	for (TActorIterator<AActor> ActorItr(GetWorld()); ActorItr; ++ActorItr)
	{
		//c->ClientMessage(ActorItr->GetName());
	}
}
2

It seems that InitGame is called really early during the loading. So the PlayerController may not exist at this time.
Try to move this code in BeginPlay and it should work.