Verbraucher Rule Notifikation Problem

rule "Trockner Überwachung: Benachrichtigung"
when
    Item WK_Trockner_OpState changed
then
if (timer === null) {
        timer = createTimer(now.plusMinutes(5), [ |
            if (WK_Trockner_OpState.state == MODE_FINISHED && trockner_dummy_status.state == ON) {
                pushover("xxxxxxx", "xxxxxx", "Trockner: Fertig !")
                trockner_dummy_status.sendCommand(OFF)
                WK_Trockner_Switch.sendCommand(OFF)
                            }
        timer = null 
        ] )
WK_Trockner_Switch.sendCommand(ON)
    }
end

rule "Trockner Überwachung: Benachrichtigung"
when
    Item WK_Trockner_OpState changed
then
    if (WK_Trockner_OpState.state == MODE_FINISHED && trockner_dummy_status.state == ON) {
pushover("xxxxxxx", "xxxxxx", "Trockner: Fertig !")
 trockner_dummy_status.sendCommand(OFF)
 WK_Trockner_Switch.sendCommand(OFF)


if (timer === null) {
        timer = createTimer(now.plusMinutes(5), [ |
		WK_Trockner_Switch.sendCommand(ON)
		        }
        timer = null 
        ] )
    }
end