What is wrong with this script?

I get an error:

ERROR:homeassistant.bootstrap:Invalid config for [script]: extra keys not allowed @ data['script']['opladers_aan']['opladers_aan']
opladers_aan:
  alias: Opladers aan
  sequence:
    - service: ifttt.trigger
      data: 
        service_data: {"event": "Opladers_aan"}
    - delay:
        seconds: 5
    - service: ifttt.trigger
      data: 
        service_data: {"event": "Opladers_aan"}
    - delay:
        seconds: 5
    - service: ifttt.trigger
      data: 
        service_data: {"event": "Opladers_aan"}
    - service: input_boolean.turn_on
      data:
        entity_id: input_boolean.opladers_aan

@github