onEnterSleep on VenuSQ and Venu2s

I get "Unexpected Type Error" from calling an simple function in onEnterSleep() and it only happens on the real Venu SQ and Venu 2s device. (information from ERA report.)

Sample code is

 

onEnterSleep(){
    obj.setPowerMode(false)
}

//obj class//
setPowerMode(isPowerMode){
    powerMode = isPowerMode
}

the code work fine on other devices. is something different on these 2 model ?