Agenda view next and prev month buttons not working

Latest AiOEC version will not go forward or backward by month in agenda view. clicking on month allows proper selection. In other views it wirks fine.

https://www.disciplineofpleasure.com/calendar/action~agenda/page_offset~1/time_limit~1457537401/request_format~json/

https://www.ads-software.com/plugins/all-in-one-event-calendar/