table id=table - Invalid JSON response

I'm using Server side processing of DATATABLES using larvel5.3

this us my JS code

var users = $('.users-datatable').DataTable({
        processing: true,
        serverSide: true,
        ajax: "}",
        columnDefs: [{
            targets: [0, 1, 2],
            className: 'mdl-data-table__cell--non-numeric'
        }]
    });

and this my response

{"draw":2,"recordsTotal":1,"recordsFiltered":1,"data":[["taimoor","hassan","dastisupportadmin@gmail.com"]],"input":{"draw":"2","columns":[{"data":"0","name":"","searchable":"true","orderable":"true","search":{"value":"","regex":"false"}},{"data":"1","name":"","searchable":"true","orderable":"true","search":{"value":"","regex":"false"}},{"data":"2","name":"","searchable":"true","orderable":"true","search":{"value":"","regex":"false"}}],"order":[{"column":"0","dir":"asc"}],"start":"0","length":"10","search":{"value":"","regex":"false"},"_":"1480405136776"}}

It is working fine on my local machine Ubuntu 16.04 but on server same Ubuntu 16.04 its is giving my Invalid JSON error.

Please help me

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