I use TabModuleSettings for saving, I checked whether they are saved into the Table in the DataBase. The settings are indeed saved.

However, whenever I try to access them with Settings[] or the following code, I'll get a Null Reference

                roleName = (string)modController.GetModuleSettings(ModuleId)["rolename"];

                detailProperties = (string)modController.GetModuleSettings(ModuleId)["detailproperties"];
    
                displayProperties = (string)modController.GetModuleSettings(ModuleId)["displayproperties"];

When I set the value by hand, ie roleName ="Administrators" my module works, so the error is narrowed down to this.

How can I access my TabModuleSettings?