There is a small issue on the Unity package, Scene 3.
If the character isn't moving in your scene, it's because de function
PoseUser.OnNewFrame is not called. If you look at the AstraController GameObject you'll see that the function is missing.
To fix this, in PoseUser script, change the
OnNewFrame( BodyFrame frame) function to
public void OnNewFrame(Astra.BodyStream bodyStream, Astra.BodyFrame frame) ; and assign the New Body Frame Event on the AstraController GameObject to the function so it looks like this :