Schedule not building

Hi,

I’m adding a class, instructor and location but when I go to schedule and try add a class to the schedule nothing happens.

More specifically:
A spinning circle appears next to the Add item and that’s it.
The schedule of days to the right is not updated.

I’ve tried completely deleting the plugin and then pressing Import/Update and then added the class, instructor and location again, but still no update to the schedule.

Can you help?

Thanks,

Guy

https://www.ads-software.com/plugins/weekly-class-schedule/