Hi Chapman,
Try clearing your caches as Snaike suggested. Unexpected errors are usually a result of the game code not executing properly and getting a different result than expected on both sides (server side and client side). If your cached files are older versions then what he have on our servers then they may not be compatible and that would lead to these kind of errors.
As usual, be sure to reset your favorite game options (graphics, flagstick animations etc) and allow for a slightly longer loading time the first time you tee it up after clearing out.