Need help with Calendar Event Light Schedule

Hi,

I have recently added Google Calendar integration to my Home Assistant and I was able to use basic Calendar trigger events.

However I saw Calendar Event Light Schedule automation recipe
from URL : Calendar Event Light Schedule
This example consists of:

For the calendar entity calendar.device_automation
When event summary contains Front Lights
Turn on and off light named light.front when the event starts and ends

automation:
  alias: Front Light Schedule
  trigger:
    - platform: calendar
      event: start
      entity_id: calendar.device_automation
    - platform: calendar
      event: end
      entity_id: calendar.device_automation
  condition:
    - condition: template
      value_template: "{{ 'Front Lights' in trigger.calendar_event.summary }}"
  action:
    - if:
        - "{{ trigger.event == 'start' }}"
      then:
        - service: light.turn_on
          entity_id: light.front
      else:
        - service: light.turn_off
          entity_id: light.front
  mode: queued

and tried to setup up this automation in yaml editor with my entities and google calendar, when I save it this error shows up:

Message malformed: extra keys not allowed @ data['automation']

As shown below:

Have no idea what is wrong, basically I’m trying to Turn on and off light named entity when the event starts and ends. Any help appreciated, thanks in advance.