You need to enable Queue at the organization level and then configure at the center level for the Queue to function.
To enable queue at the organizational level
Click the Admin icon.
Navigate to Organization > Organizations > Settings > Queue/Guest Kiosk.
Locate and select the Enable Admin Queue checkbox.
Queue is enabled at the organization level and now you can configure Queue and its settings in center level.
You can launch queue web check-in for Kiosk without token using one of the following options:
Enable online check in for guests using the url: domain.zenoti.com/kiosk
For specific centers: domain.zenoti.com/kiosk/centerid
You can launch In-store Kiosk using the url: domain.zenoti.com/kiosk/mode/instore/