RuntimeError: no running event loop

[TheCarpetMerchant]

Just installed pyscript via HACS and added this script to the ~/pyscript folder using file editor :

@time_trigger("cron(*/15 * * * *)")
def water_heater():
  level = float(state.get("sensor.hyper_1_electric_level") or 0)

  if level > 98:
    log.info(f"Water Heater ON (level: {level})")
    task.executor(state.set, "light.water_heater_switch", "on")
  elif level < 80:
    log.info(f"Water Heater OFF (level: {level})")
    task.executor(state.set, "light.water_heater_switch", "off")
  else:
    # Check if the current charging speed of the batteries is more than what the water heater would consume.
    # We're only looking at one out of 2 batteries so take that into account
    if float(state.get("sensor.hyper_1_output_pack_power") or 0) > 300/2:
      log.info(f"Water Heater ON PV direct")
      task.executor(state.set, "light.water_heater_switch", "on")

(Yes I know, need to introduce a correct margin to prevent it flip-flopping, just trying to make it work for now).

This is the error I'm getting :

Exception in <file.water_heater.water_heater> line 10:         task.executor(state.set, "light.water_heater_switch", "off")                                                               ^ RuntimeError: no running event loop

Seems like something is completely wrong with the install, there's no event loop ?

[ALERTua]

try:

light.turn_on(entity_id='light.water_heater_switch')
light.turn_off(entity_id='light.water_heater_switch')

or

light.water_heater_switch.turn_on()
light.water_heater_switch.turn_off()