Python script not excute

Hi I put the script to “/storage/.kodi/userdata/autoexec.py” , it does not work ;however I execute cmd “kodi-send --action=‘RunScript(“special://profile/autoexec.py”)’” it work.does it bug?

# autoexec.py
import xbmc 
xbmc.executebuiltin("ActivateScreensaver")

This functionality was moved to service. Read Autoexec Service - Official Kodi Wiki