Task bar not showing

Hello.

In the example, as you can see, the task bar does not appear.
I don’t know how to solve this point.

Please check the contents and answer how you can fix it.
Thank you.

http://docs.dhtmlx.com/gantt/snippet/775f6adf

Hello,
I see that the task dates are outside the displayed date range. The dates are in 2013, while the date range is within September - December 2021. With this configuration, you should see an empty timeline. The option show_tasks_outside_timescale allows displaying these tasks in the grid. And this is what I see in the snippet. So, everything works as expected.