The widget may not be displayed when the "Hide widget when there are no operators available" function is enabled
If you do not have such a feature enabled, then make sure that you have added operators to the widget. If there are no operators in the widget, the widget will not be displayed.
Also, the widget is not displayed when an http connection is made on the site. Check that your site has an https connection.
If you checked every item and none of this helped, write to us in tech support!