Calendar nav buttons not working

The navigation buttons on the calendar have suddenly stopped working on my website… any ideas please?

https://cunninghaminfants.herts.sch.uk/calendar/

I have tried to disable all other plugins to see if there is a conflict but no luck.

Many thanks!

https://www.ads-software.com/plugins/quick-event-manager/

UPDATE – I FOUND THE ANSWER! THERE IS AN OPTION TO “Jump to the top of the calendar when linking to a new month”; when de-selected the nav buttons come back to life!!!