So there is a bit of a catch-22 situation in GG atm.
With physics on the RotateToPlayer functions don't appear to work for simple entities like the crate.
With physics off the MoveForward function doesn't appear to work!
So you can make crate rotate to the player if it has physics off but it can't move towards the player OR you can make it move forwards if it has physics on but it won't rotate to face the player. (in fact it just seems to spin like mad)
So we have to do the old CollisionOff/CollisionOn trick around the rotation part.
Been there, done that, got all the T-Shirts!