Thank you for allowing me to assist you, my name is Joe and I will be happy to assist you with your concern today.
Was this also a problem before moving it? If not there is a chance something simply got knocked loose unless the unit was banged into something or dropped. I would start by removing the cover and see if any components are loose and able to move around.
Thank you!- Joe
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You will want to check corner to corner level. Next check your belt and make sure it is cleaned and proper adjustment and that it is not loose which goes for both, there is also a special belt lube for the track, check your rollers, etc.