Services and Working Hours not saving in Appointment+ subsite

Hi there,

I am experiencing an issue being able to save any changes to the default services and working hours screens in the Appointments+ plugin. I am trying to follow your tutorial in setting up Appointments+.

I am currently running WP 4.2.2 with all the latest updates loaded for all WPMUDEV plugins. I have not selected any add-ons within the Appointment+ settings area.

Please could you advise how to add services and change the working hours?

Thanks in advance.
Elliot