Bilresa E2489 Matter trigger light configuration

I want to use Ikea Bilresa E2489 dual remote on Matter to toggle a Z2M light bulb. The E2489 device firmware is 1.9.15. When I "Run Actions" on the automation, the light toggles correctly, so the difficulty is correctly specifying the trigger.

The "event.bilresa_dual_button_button_1_5" isn't syntax I made up, but was inserted when I selected what I thought was best.

In the Device, pressing the buttons correctly displays as a Button (1) event. I've tried so many different combinations that don't work, so I'm needing help.

Solutions or suggestions would be very appreciated.

description: ""
triggers:
  - trigger: state
    entity_id:
      - event.bilresa_dual_button_button_1_5
    attribute: event_type
    from:
      - multi_press_1
conditions: []
actions:
  - action: light.toggle
    metadata: {}
    target:
      entity_id: light.0xb4e84292b5000000
    data: {}
mode: single

Thanks for this service.

Other posts showed the cause a sync problem with automations.yaml. Thankfully, I didn't have any needed automations yet, so I deleted and touched the /config/automations.yaml file, which resolved the problem.

Now I can save automations.