You should define the available time-slots for each weekday.
To define the available time slots go to the "WordPress administration menu >> Settings >> Appointment Booking Calendar >> Manage Settings":
- The first step is to un-check the non-working days, for example Sunday and Saturday.
- The second step (important!) is to click on each weekday tab and add the time slots available for each day. Each time slot has a defined capacity (number of bookings it will accept), you can indicate that in this step. There are options to add many time slots in one single step.
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