Hello, so i take the guide about task grouping in docs.dhtmlx.com/gantt/samples/0 … uping.html
but i have problem with dhtmlxgantt_grouping.js when i click the function always error like this Uncaught ReferenceError: Gantt is not defined on dhtmlxgantt_grouping.js. And on client side Uncaught TypeError: gantt.groupBy is not a function ?
Thank you