Datepicker Calendars won't pop-up

The Plugin has some Widgets as well as some Shortcodes that use the datepicker calendars for letting the customers choose the Check-in and Check-out Dates.

When such fields get the focus by clicking on them, the datepicker calendar should pop up. If the calendars are not being displayed when clicking on those fields then there is a Javascript conflict on your website with other modules/plugins that is breaking this function.