When I change the value of the input I get the error (see the picture).
First I add a empty row, then I want edit each cell using the "Enter" key.

$(document).ready(function () {
    rows = 0;
    editor = new $.fn.dataTable.Editor({
        table: "#example",
        "idSrc": "idProduct",
        fields: [
            {
                label: "Producto:",
                name: "idProduct"
            },
            {
                label: "Nombre:",
                name: "name",
            },
            {
                label: "Cantidad:",
                name: "quantity"
            },
            {
                label: "Precio:",
                name: "price"
            }
        ]
    });

    $('#example').on('click', 'tbody td:not(:last-child)', function (e) {
        selected = table.cell(this).index();
        table.cells(selected.row, selected.column).edit();
    });
    table = $('#example').DataTable({
        keys: true,
        columns: [
            {
                data: "idProduct",
                orderable: false
            },
            {data: "name"},
            {data: "quantity"},
            {data: "price"},
            {
                data: null, render: function (data, type, row) {
                return data.quantity * data.price;
            }
            },
        ],
        searching: false,
        paging: false,
        info: false,
        select: {
            style: 'os',
            selector: 'td:first-child'
        }
    });
    editor.on('close', function (e) {
            if (key == 13) {
                console.log(JSON.stringify(editor.get()));
                if (selected.column < columns) {
                    selected.column++;
                    table.cells(selected.row, selected.column).edit();
                } else {
                    if (selected.row == rows) {
                        rows++;
                        addRow();
                    }
                    selected.row++;
                    selected = table.cell({row: selected.row, column: 0}).index();
                    table.cells(selected.row, selected.column).edit();
                }
            }
        }
    );

});

function addRow() {
    table.row.add({
        'idProduct': "",
        'name': "",
        'quantity': "",
        'price': ""
    }).draw();
}

$(document).on('keyup', function (e) {
    key = e.keyCode;
});