Ah, sorry, forgot that the UI nodes only use selected data.
You have to store those objects into selected data, or better the UI components.
It's pretty simple, use a Select Components node:
- data key: ui (same as in the UI nodes)
- component name: IUIBase (this is the base interface for UI boxes and HUDs and will get you the components for them)
- object: your actor
Put this right after the settings node an the selected data ui will have all UI components for the nodes to manipulate.
You can also do this outside UI schematics, e.g. if you want to fade out all UI during certain attacks or cutscenes handled by schematics.