If there is one location pre-defined in the widget code, the widget will skip the location view and move directly to next steps assuming the customer is aware which location is selected.
If you wish to show the location selection page even though there is only 1 location available and pre-defined in the widget, you can add the following line to the widget code:
setster_widget_options.showDefaultLocation = 1;
This will make sure your customer sees the single location available and select it to move forward in the booking process.
Alternatively you can turn this feature on to all of your widget as an option within your booking rules. To do go to:
Settings >> Options >> Booking Options >> Show/Hide location selection if only one location is available during booking
For more info, please do get in touch.