Membuat grafik dengan javascript tapi tidak muncul

Tolong ini saya bingung bikin grafik garis tapi ga mau muncul. Ini mau nampilin jml data perbulan. Aku cek query kaya udah bener, tapi tetep ga muncul apa2. makasih yg udah respon Ini query nya

include('./controller/koneksi.php');
                date_default_timezone_set('Asia/Jakarta');                        $tahun = date("Y");
                 $querylog1 = "SELECT COUNT(*) as jumlah FROM `radacct` WHERE acctstoptime > '0000-00-00 00:00:01' AND month(acctstoptime) = 1 and year(acctstoptime) = $tahun";
                 $sqllog1 = mysqli_query($koneksi, $querylog1);
                 $datalog1 = mysqli_fetch_row($sqllog1);


                        $querylog2 = "SELECT COUNT(*) as jumlah FROM `radacct` WHERE acctstoptime > '0000-00-00 00:00:01' AND month(acctstoptime) = 2 and year(acctstoptime) = $tahun";
                        $sqllog2 = mysqli_query($koneksi, $querylog2);
                        $datalog2 = mysqli_fetch_row($sqllog2);

//ini javascriptnya

var lineChartData = {
    labels: ['Januari', 'Februari', 'Maret', 'April', 'Mei', 'Juni', 'Juli', 'Agustus', 'September', 'Oktober',
        'November', 'Desember'
    ],
    datasets: [{
        label: 'Download(Gb)',
        borderColor: window.chartColors.red,
        backgroundColor: window.chartColors.red,
        fill: false,
        data: [<?php echo $datalog1; ?> , <?php echo $datalog2; ?>, <?php echo $datalog3; ?> , <?php echo $datalog4; ?> , <?php echo $datalog5; ?> , <?php echo $datalog6; ?> , <?php echo $datalog7; ?> , <?php echo $datalog8; ?> , <?php echo $datalog9; ?> , <?php echo $datalog10; ?> , <?php echo $datalog11; ?> , <?php echo $datalog12; ?>
        ],
        yAxisID: 'y-axis-1',
    }]
};

window.onload = function() {
    var ctx = document.getElementById('canvas2').getContext('2d');
    window.myLine = Chart.Line(ctx, {
        data: lineChartData,
        options: {
            responsive: true,
            hoverMode: 'index',
            stacked: true,
            scales: {
                yAxes: [{
                    type: 'linear', // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance
                    display: true,
                    position: 'left',
                    id: 'y-axis-1',
                }
                }],
        }
    });
};