Internal Server Error

Question

$(document).ready(function () {
        //getting Error in this line
       var oTable = $('#myTable').DataTable({

           ajax: {
               type: 'Post',
               url:'@Url.Action("ClientProductList", "ClientMaster")',
               contentType: "application/json; charset=utf-8",
               datatype: 'json',

                   },
                       columns: [
                           { data: 'CLProductId', autowidth: true },
                           { data: 'ProductId', autowidth: true },
                           { data: 'ProductName', autowidth: true },
                           { data: 'ClientProductDetail', autowidth: true },
                           { data: 'ParentProductId', autowidth: true },
                           { data: 'Act_Date',autowidth: true },
                           { data: 'Exp_Date', autowidth: true },
                           {
                               "data": "CLProductId", 'bSortable': false,
                               'aTargets': -1, "width": "50px", "render": function (data) {
                                   return '<a class="popup btn btn-info text-center" href="/ClientProduct/EditProduct/' + data + '">Edit</a>';
                               }
                           },
                           {
                               "data": "CLProductId", 'bSortable': false,
                               'aTargets': -1, "width": "50px", "render": function (data) {
                                   return '<a class="popup btn btn-danger text-center" href="/ClientProduct/DeleteProduct/' + data + '">Delete</a>';
                               }
                           }

                       ]

                   });
               })