error

{  
   "code":500,
   "success":false,
   "message":"Not able to place order. Please try after some time",
   "developerMessage":{  
      "errors":{  
         "totalPrice":{  
            "message":"Cast to Number failed for value \"NaN\" at path \"totalPrice\"",
            "name":"CastError",
            "stringValue":"\"NaN\"",
            "kind":"Number",
            "value":null,
            "path":"totalPrice",
            "reason":{  
               "message":"Cast to number failed for value \"NaN\" at path \"totalPrice\"",
               "name":"CastError",
               "stringValue":"\"NaN\"",
               "kind":"number",
               "value":null,
               "path":"totalPrice"
            }
         },
         "products":{  
            "message":"Cast to Array failed for value \"[{\"productId\":\"5ac6562e0911f223fdc63430\",\"name\":\"poori sabj3\",\"quantity\":3,\"price\":30},{\"productId\":\"5ae4a79d0bfd174b8e652028\",\"name\":\"poori sab\",\"quantity\":5,\"price\":30}]\" at path \"products\"",
            "name":"CastError",
            "stringValue":"\"[{\"productId\":\"5ac6562e0911f223fdc63430\",\"name\":\"poori sabj3\",\"quantity\":3,\"price\":30},{\"productId\":\"5ae4a79d0bfd174b8e652028\",\"name\":\"poori sab\",\"quantity\":5,\"price\":30}]\"",
            "kind":"Array",
            "value":"[{\"productId\":\"5ac6562e0911f223fdc63430\",\"name\":\"poori sabj3\",\"quantity\":3,\"price\":30},{\"productId\":\"5ae4a79d0bfd174b8e652028\",\"name\":\"poori sab\",\"quantity\":5,\"price\":30}]",
            "path":"products",
            "reason":{  
               "message":"Cast to embedded failed for value \"\\'[{\"productId\":\"5ac6562e0911f223fdc63430\",\"name\":\"poori sabj3\",\"quantity\":3,\"price\":30},{\"productId\":\"5ae4a79d0bfd174b8e652028\",\"name\":\"poori sab\",\"quantity\":5,\"price\":30}]\\'\" at path \"products\"",
               "name":"CastError",
               "stringValue":"\"\\'[{\"productId\":\"5ac6562e0911f223fdc63430\",\"name\":\"poori sabj3\",\"quantity\":3,\"price\":30},{\"productId\":\"5ae4a79d0bfd174b8e652028\",\"name\":\"poori sab\",\"quantity\":5,\"price\":30}]\\'\"",
               "kind":"embedded",
               "value":"'[{\"productId\":\"5ac6562e0911f223fdc63430\",\"name\":\"poori sabj3\",\"quantity\":3,\"price\":30},{\"productId\":\"5ae4a79d0bfd174b8e652028\",\"name\":\"poori sab\",\"quantity\":5,\"price\":30}]'",
               "path":"products",
               "reason":{  
                  "message":"Parameter \"obj\" to Document() must be an object, got [{\"productId\":\"5ac6562e0911f223fdc63430\",\"name\":\"poori sabj3\",\"quantity\":3,\"price\":30},{\"productId\":\"5ae4a79d0bfd174b8e652028\",\"name\":\"poori sab\",\"quantity\":5,\"price\":30}]",
                  "name":"ObjectParameterError"
               }
            }
         }
      },
      "_message":"order validation failed",
      "message":"order validation failed: totalPrice: Cast to Number failed for value \"NaN\" at path \"totalPrice\", products: Cast to Array failed for value \"[{\"productId\":\"5ac6562e0911f223fdc63430\",\"name\":\"poori sabj3\",\"quantity\":3,\"price\":30},{\"productId\":\"5ae4a79d0bfd174b8e652028\",\"name\":\"poori sab\",\"quantity\":5,\"price\":30}]\" at path \"products\"",
      "name":"ValidationError"
   }
}