How to reproduce:
1. Open the attached “IN-18499” project
2. Enter the Play Mode in the “MainScene” Scene
3. Open the “Window → Entities → Hierarchy” window from the menu
Expected result: Entities Hierarchy window is properly loaded without any errors thrown
Actual result: Entities Hierarchy window is empty with “ArgumentException: A component with type:Unity.Scenes.SubScene has not been added to the entity.” thrown in the Console log
Reproducible with: 1.0.0-exp.8 (2022.2.0b11)
Couldn’t test with: 2020.3.40f1, 2021.3.12f1 (project isn’t compatible), 2022.1.20f1, 2023.1.0a15 (DOTS isn’t supported)
Reproduced on: macOS 12.5 (Intel)
Note: In 0.51.1 and below, follow the “Window → DOTS → Hierarchy” path in the menu to open the Entities Hierarchy window