Grant Chart Hide and show button not working

Hi
I am using the Gantchart in my web application. I have a problem with expand and collapse the tasks, etc. It was working fine earlier, and now on the browsers (Google chrome, IE, Firefox, edge) it is not working.

No action happens when i click to expand the levels.
Does anyone face the issues on the browser?

Thanks
Jai

Hello.

Unfortunately, I can’t reproduce the issue.

Perhaps there are some additional configurations in your application. Try to reproduce the issue in the snippet DHTMLX Snippet Tool and send it to me. Describe additional details or provide access to a demo.