not working sum fields (score) for chart consoleTv in laravel

$chart = Charts::create('bar', 'highcharts')->title("Kehadiran")->elementLabel("Total")->dimensions(1000, 400)->labels($abc->pluck('created_at'))->values($abc->pluck('total'));

$abc = DB::table('ups')->select('ups.created_at', DB::raw('sum(ups.score) as total'))->groupBy('created_at')->get(); my view char

via Chebli Mohamed