If the date and time of your appointment is displayed as a candidate with the calendar linked, please reconnect your calendar and check again.

For more information about calendar settings, please click here. If your calendar is connected properly, you can select the date and time by checking the checkboxes.

https://www.jicoo.com/dashboard/calendars/integrations

If the above does not work, please check if your Google Calendar is set to "Available".

Click here for more information about the public range of Google Calendar.