Next & past Month View won’t load

Following on from Shelby’s Message on this thread, https://www.ads-software.com/support/topic/next-month-view-wont-load/ I’m opening my own question because i cannot move forward or back on the month selector. Even using the pop up calendar box has no affect. It just stays on the current month (December)

I can click on the events and move through to the next event but clearly not being able to use the calendar to view dates and events is a problem. Have only noticed this being an issue since updating the plugin to Version 4.3.4.2

thank you