Events+ calendar shortcode pagination broken

Hello!
at http://jewishartistcenter.org/courses I have an events calendar shortcode:
[eab_calendar navigation="yes"]
However the navigation/pagination feature is not working, it seems that clicking on the arrows merely scroll the page to the calendar, but don't advance the date.
If I copy the URL of the pagination arrows and paste it into the address bar, the calendar loads the appropriate date, e.g. http://jewishartistcenter.org/courses/?date=2015-10#eab-calendar-eab-monthly_calendar-eab-shortcode_calendar

Thank you for looking in to this.