I had tried to make builds of the scene examples of the new MRTK version 2.0.0-RC1 on Unity 2018.3.10f1 but every time with every example there's a build error which says: The type or namespace name 'HandJointKind' could not be found (are you missing a using directive or an assembly reference?) The type or namespace name 'HandMeshObserver' could not be found (are you missing a using directive or an assembly reference?) The type or namespace name 'JointPose' could not be found (are you missing a using directive or an assembly reference?)
Where do I get the library for this namespaces?