No ADC pin Found

Hi I am running the python example:

`#! /usr/bin/env python
from iteadsdk import *
LED = GPIO4
pinMode(LED, OUTPUT)
while True:
    digitalWrite(LED, HIGH)
    delay(1000)
    digitalWrite(LED, LOW)
    delay(1000)`

The LED is connected to GPIO4, but when I run the example I only got:
No ADC pin found.

I compiled the lastest version of Segnix to my RaspberryPi 3 B+

