pie chart - Google Piechart -

i try create pie chart on website, found example code

<div id="piechart"></div>  <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>  <script type="text/javascript">     // load google charts     google.charts.load('current', {'packages':['corechart']});     google.charts.setonloadcallback(drawchart);      // draw chart , set chart values     function drawchart() {         var data = google.visualization.arraytodatatable([             ['task', 'hours per day'],             ['work', 8],             ['eat', 2],             ['tv', 4],             ['gym', 2],             ['sleep', 8]         ]);          // optional; add title , set width , height of chart         var options = {'title':'my average day', 'width':550, 'height':400};          // display chart inside <div> element id="piechart"         var chart = new google.visualization.piechart(document.getelementbyid('piechart'));         chart.draw(data, options);     } </script> 

(https://www.w3schools.com/howto/tryit.asp?filename=tryhow_google_pie_chart)

but error message :

table has no columns.

can me pls?

thanks

unfortunatelly cannot comment.

this code works - fiddle. give more details project?

sample of code fiddle

<div id="piechart"></div> 

edit:

table has no columns.

is error message browser console?