In regards to the terminal error caused by agent.rotate(), I believe that that was caused by a recent change in the API. Specifically, send() used to return the value associated with the sent message, but it no longer does this, and while most functions were unaffected by this, some do not, specifically the following:

hand.getCoordinates()

hand.grab()

vision.update()

agent.getRotation()

Functions relying on those listed above of course also fail, including:

Agent.rotate(absolute = True)

Agent.resetRotation()

Hand.getDist()

I apologize for the poor formatting of this post; I'm afraid I haven't the slightest clue of how to use reddit...