The property 'categories' must be an array

Sending:

{ location: 
   { ___class: 'GeoPoint',
     longitude: ...,
     latitude: ...,
     categories: [ 'user' ] 
  } 
}

Receivng: {“code”:4037,“message”:“The property ‘categories’ must be an array”}

Hi, Jarod.

Please, provide more information, what you are doing.
Maybe a code, which reproduce your problem.