Find your event at account.eventcadence.com, and ensure Appointments are enabled in your Event > Menu Configuration. Then navigate to the Appointments Menu.
From here click Configuration, and check Attendees Sign In Enabled and Standard Check-in.

Find your event at account.eventcadence.com, and ensure Appointments are enabled in your Event > Menu Configuration. Then navigate to the Appointments Menu.
From here click Configuration, and check Attendees Sign In Enabled and Standard Check-in.