The ptr declaration.
and the constructor initialization.
I created a bp class inheriting from the c++ class, and the widget is visible in the viewport of the blueprint, but not in game.
What is causing this?
Do you have this somewhere in your class?
UUserWidget* theWidget;
Widget->SetWidget(theWidget);
When you call USceneComponent::SetVisibility on the WidgetComponent it won’t have any effect on the UserWidget unless if the UserWidget is already Visible.
You can’t Get a reference to the UserWidget until it is initialized which happens in UWidgetComponent::InitWidget on BeginPlay.
The Editor Viewport displays UserWidgets Default settings.
The Play-mode Viewport runs the Widget Graph which is probably why you see a difference between the Editor and Play mode.
You should ensure that the UserWidget is not being hidden somwhere in a graph.