Data table working on localhost but not online server

Jatin

I am using server side datatables.

I am able to run my script on localhost successfully but online it's not working.

My server side function

 function addevents()
{
    $table = 'mov_wsmovies_events';
    $primaryKey = 'id';
    $columns = array(
        array( 'db' => 'title', 'dt' => 'title' ),
        array( 'db' => 'profile_image', 'dt' => 'profile_image', 
            'formatter' => function( $d, $row ) {
                //$src = $base.'/'.$d;
                $src = JURI::root().$d;
                return "<img src='$src' width='50px' height='50px'>
    ";
            }
         ),
        array( 'db' => 'cover_image', 'dt' => 'cover_image', 
                'formatter' => function( $d, $row ) {
                    $src = JURI::root().$d;
                return "<img src='$src' width='60px' height='40px'>
    ";
            }
         ),
        array(
            'db'        => 'id',
            'dt'        => 'action',
            'formatter' => function( $d, $row ) {
                return "<a href='#' onclick='funedit($d)'><i class='fa fa-pencil-square-o' aria-hidden='true'></i></a> <a href='#' onclick='fundelete($d)'><i class='fa fa-trash' aria-hidden='true'></i></a> <a href='index.php?option=com_wsmovies&Itemid=604&view=addevents&model=addevents&layout=manage_pricings&eventId=".$d."'><label class='label label-primary'>Manage pricings</label></a>
    ";
            }
        )
    );
    $sql_details = $this->db_details();

    $where = "id =1";
    $user = JFactory::getUser();
    $user_id = $user->id;
    $res = DatatableHelper::complex( $_GET, $sql_details, $table, $primaryKey, $columns, null,"user_id = $user_id" );
    echo json_encode($res);
    die;
}

My client side function

  var eventTable;
$(document).ready(function() {
eventTable = $('#example').DataTable( {

    "processing": true,
    "serverSide": true,
    "ajax": "<?php echo JRoute::_('index.php?option=com_wsmovies&task=addevents' ); ?>",
    "columns": [
        { "data": "title" },
        { "data": "profile_image" },
        { "data": "cover_image" },
        { "data": "action" },
    ],
} );


$('#example_length select').css("display", "inline");
$('#example_filter input').css("display", "inline");
 } );

I am getting error like

    DataTables warning: table id=exampleone - Invalid JSON response. For more information about this error, please see http://datatables.net/tn/1

Please somebody help me to solve this issue.