http://mover.io/box-apis-occasional-unexpected-multiple-error-format/

documentation-example-error.json

{
  "type" : "error",
  "status" : 404,
  "code" : "not_found",
  "help_url" : "",
  "message" : "Folder not found",
  "request_id" : "7522414694f97d171b6aea"
}

multiple-error-format.json

{
  "entries" : [ { 
    "code" : "item_name_in_use",
    "context_info" : { 
      "conflicts" : [ {
        "etag" : "69f62830ec74a2d4c7ee601bfc111f148cc23d91",
        "id" : "2649370661",
        "name" : [Removed],
        "sequence_id" : "0",
        "type" : "file"
      } ]
    },
    "help_url" : "http://developers.box.com/docs/#errors",
    "message" : "Item with the same name already exists",
    "request_id" : [Removed],
    "status" : 409,
    "type" : "error"
  } ],
  "total_count" : 1
}

single-error-format.json

{
  "type" : "error",
  "status" : 404,
  "code" : "not_found",
  "help_url" : "http:\/\/developers.box.com\/docs\/#errors",
  "message" : "Not Found",
  "request_id" : [Removed]
}