Appointments not working if a user is not logged in

Hi guys how are you I hope great!

I selected that a user does not need to be logged in to book an appointment, however every time I am not logged in I can't even switch service schedules... Now the moment I log in I can switch service schedules, select date and time and book...

I've tried selecting force logged in users and then swtiching it back and nothing.

Here's the link: http://www.essenzaspaholistico.com/reserva-en-linea/

I also granted support access in case you need it..

Thanks