You need to enable the Guest Kiosk at the Organization level and then proceed to enable and configure Guest Kiosk at the center level.
To enable guest kiosk at the organizational level
1. At the organizational level navigate to Admin > Organization > Organizations > Settings > General.
The General Settings opens.
2. Locate and select Enable Guest Kiosk checkbox.
3. Click Save.
Guest Kiosk is enabled at the organization level and you can enable and configure Guest Kiosk and its settings at the center level.