why this is js script does not work to appear Google Chart ? i use powerbuilder 2019 R2, i send the sample application

google.load("visualization", "1", {packages:["corechart"]});  google.setOnLoadCallback(function() {  drawChart();	} );
function drawChart() { var datosjson; var col = 'name'; var typecol = 'string'; var col1 = 'salesterritory_salesytd'; var typecol1 = 'number'; var col2 = 'salesterritory_saleslastyear'; var typecol2 = 'number'; var title = '';
$.getJSON("json1.json",function(data) { var datatable = new google.visualization.DataTable();
datatable.addColumn(typecol,col);
datatable.addColumn(typecol1,col1);
datatable.addColumn(typecol2,col2);
$.each(data, function(index,value){datatable.addRow([value.name,value.salesterritory_salesytd,value.salesterritory_saleslastyear]);
 }); var options = { "title": title, "width": 650, "backgroundColor": "#E4E4E42",  "is3D": true, "legend": {position: "left", textStyle: {fontSize: 10}, maxLines: 2}, "titleTextStyle": { fontSize: 35, bold: true, color:"blue"}, "height": 500};
 var chart = new google.visualization.PieChart(document.getElementById("chart_div"));
 chart.draw(datatable, options);  });}