You can test avatar at TestScene3 of SDK but must fix it because of developer's mistake.
At "PoseUser" script, add "Astra.BodyStream bodyStream, " to parameter of "OnNewFrame" function.
And reconnect this function to "New Body Frame Event" of "AstraController" object.
Last, play scene.
If has another issue to except problem of this post, avatar's arm is twisted when user shakes hands.
I think this is also bug in SDK.
I'll uploading video for bug reported above.