signals:
    void currentIdSeansForScheduleChanged(int currentIdSeansForSchedule);

    Connections {
        target: AppCore
        function onCurrentIdSeansForSchedule(idUser) {
            console.log(2222222)
        }
    }

I get the error:

qrc:/Schedule.qml:6:5: QML Connections: Detected function "onCurrentIdSeansForSchedule" in Connections element. This is probably intended to be a signal handler but no signal of the target matches the name.