Won't work not in 2018.2, nor in 2018.3

[revanaii]

2018.2.14f1

1. Open the project, see a lot of error related to TextMeshPro conflicts. Remove TextMeshPro in PackageManager, so only one copy of the plugin is left.
2. Press Play, see a bunch of new NullReferenceException
   NullReferenceException: Object reference not set to an instance of an object
   CameraManager.Start () (at Assets/Scripts/Managers/CameraManager.cs:22)
   NullReferenceException: Object reference not set to an instance of an object
   UIManager.Start () (at Assets/Scripts/Managers/UIManager.cs:17)

2018.3.0b9
Same thing, just with even more package-related errors.