When i try to create zoho books estimates from zoho creator. I am getting an error like 

{

    "code": 1048,

    "message": "Sorry, there was an internal error. Please contact support.india@zohobooks.com for assistance."

} 

---

My Post data

{

    "date": "13-Aug-2018",

    "line_items": [

      {

        "line_item_id": 1026598000000104003,

        "quantity": 3,

        "rate": 150,

        "hsn_or_sac": 5907,

        "name": "Canvasprinhiresphotorint",

        "item_total":150

       

      }

    ],

    "customer_id": 1026598000000144131,

    "place_of_supply": "AD",

    "expiry_date": "14-Aug-2018",

    "rate": 120,

    "unit": " ",

    "quantity": 1

  }