How to reproduce:
1. Open the attached “TestingProject2” project
2. Open scene "Assets/CharlieMadeAThing/NeatoTags/Demo/Scenes/DemoScene"
3. Select “Human” in the Hierarchy
4. Enter Play Mode
5. Exit Play Mode
6. Select “File” → “Save” in the main menu bar
7. Observe the Console
Expected result: No errors appear
Actual result: “SerializedObjectNotCreatableException: Object at index 0 is null” error appears
Reproducible with: 2021.3.10f1, 2022.1.17f1, 2022.2.0b9, 2023.1.0a12
Couldn’t test with: 2020.3.39f1 (Console errors)
Reproducible on: Windows 10
Note: Error seems to be related to the Neato Tags asset