1. What happened
The "Entities Hierarchy" window stops displaying anything when a subscene is loaded using SceneSystem.LoadSubScene(worldUnmanaged, entitySceneReference), and the console outputs the following error:
"ArgumentException: A component with type:Unity.Scenes.SubScene has not been added to the entity."
2. How can we reproduce it using the example you attached
- Make sure the "Entities Hierarchy" window is not open currently
- Press play. At this moment, a "SceneLoaderSystem" will find a "SceneLoader" entity in the "BaseSubScene", and will load another subscene that's stored as an "EntitySceneReference" in that "SceneLoader" component
- Open the "Entities Hierarchy" window
- Notice error in console and nothing is shown in window
Unity version : 2022.2b8