message: default construct the placeholder element
diff: @@ -254,7 +254,7 @@ std::string UScreenCreditsWidget::LoadImage(const std::string& url) {
  TSharedRef<IHttpRequest, ESPMode::ThreadSafe> HttpRequest =
  FHttpModule::Get().CreateRequest();
  - _creditImages.AddUninitialized();
  + _creditImages.AddDefaulted();
  HttpRequest->OnProcessRequestComplete().BindUObject(
  this,
  &UScreenCreditsWidget::HandleImageRequest,
  