The module allows you to display an explanatory message when the carrier related to the module is not available. This message is used to distinguish a configuration error on reservations or to check the association of the customer address to a subarea. Unfortunately for this message to be displayed the carrier is just disabled on display but not in the system.
It is therefore necessary to uncheck “Show an explanatory message if the carrier is not available” in the advanced settings of the module.
In some cases it is not sufficient for a carrier to be disabled when no subarea match the address. We need the option of the carrier Prestashop : “Apply the cost of transport” to be enabled, and the option “Out-of-range behavior” to be selected on “Disable carrier”. It is therefore also create at least one price range or weight.