Error loading data in Angularjs datatable format received after server side

Question

I am trying to implement paging on the data server side using datatable and rest api corner calls. The problem the problem is when I click on the next paginated button, the data sent from the server is not loaded into the datatble after a successful callback. It displays the message “processing ..” and therefore gets stuck. Here is my controller code.

vm.dtOptions = DTOptionsBuilder.newOptions()
.withOption('ajax', {
    headers: {
        'Content-Type': 'application/json',
        'Authorization': $rootScope.currentUser.authToken
    },
    error : function (xhr,status,error)
    { 
        if(status === 401){
            window.location.replace("/pc-web/userHome");
            errorFlash(error);
        }
    },
    url: GET_ROOMLIST,
    type: 'GET'
})
// or here
.withDataProp(function(json) {
      console.log(json);

      return json.data;
    })
.withOption('processing', true)
.withOption('serverSide', true)
.withDOM('frtip')
.withDisplayLength(9)
    .withOption('createdRow', function (row) {
        // Recompiling so we can bind Angular directive to the DT
        $compile(angular.element(row).contents())($scope);
    })
    .withOption('saveState', true)
    .withOption('order', [0, 'asc'])
  .withPaginationType('simple_numbers')
.withButtons([
            {
                extend:    'csvHtml5',
                text:      'Export',
                titleAttr: 'CSV',
                exportOptions: {
                    columns: [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18]
                }
            }])

    .withOption('initComplete', function(settings) {
        // Recompiling so we can bind Angular directive to the DT
        $compile(angular.element('#' + settings.sTableId).contents())($scope);

    })
    ;

The data returned from the server has the format:

data:(9) [{…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}]

draw:1

message:null

recordsFiltered:100

recordsTotal:100

success:true

Im using datatable version: * angular -datatables - v0.5.6 * https://github.com/l-lin/angular-datatables

angular js version: 1.5.6