can not open screen manager inspector

[weilitao]

When open the sample scene in Unity (I have tested unity with version 2020, 2021, 2022), no inspector windows shown for screen manager. Instead, many errors shown in console window.

[whynames]

Same problem. Mysteriously, it works when you change something in editor script and revert back. Maybe onenable doesnt gets called at first addition

[Xerios]

Feel free to make a pull request. I'm no longer working on Unity unfortanately but I'll add whatever fixes necessary anyone makes. I'm also happy to add anyone as a maintainer whoever's willing to keep this framework in good shape