I can not show LoadingScreen using FLoadingScreenAttributes

Development Programming & Scripting
1

I wrote the c ++ code by referring to the link above.
As a result of debugging, function binding is not a problem However, LoadingScreen did not show on the screen.

This is my code.

void UEditorGameInstance::SetLoadingScreen(UUserWidget* NewLoadingWidget)
{
	LoadingWidget = NewLoadingWidget;
}

void UEditorGameInstance::Init()
{
	UGameInstance::Init();
	FCoreUObjectDelegates::PreLoadMap.AddUObject(this, &UEditorGameInstance::BeginLoadingScreen);
	FCoreUObjectDelegates::PostLoadMap.AddUObject(this, &UEditorGameInstance::EndLoadingScreen);
}

void UEditorGameInstance::BeginLoadingScreen(const FString& MapName)
{
	FLoadingScreenAttributes LoadingScreen;
	LoadingScreen.bAutoCompleteWhenLoadingCompletes = true; 
	if(LoadingWidget)
		LoadingScreen.WidgetLoadingScreen = LoadingWidget->TakeWidget();
	else
		LoadingScreen.WidgetLoadingScreen = FLoadingScreenAttributes::NewTestLoadingScreenWidget();

	GetMoviePlayer()->SetupLoadingScreen(LoadingScreen); 
	GetMoviePlayer()->PlayMovie();
}

The function of ‘SetLoadingScreen(UUserWidget*)’ is regist my LoadingScreen widget.
Where did I get it wrong? Am I misunderstanding? How to make LoadingScreen?

2

I found one thing by referring to the Shooter Game today.
This LoadingScreen did not work on the editor screen.
Tested through the StandAlong Game, it worked.