My automation generates an error message

Configuration
1

Hi,
I am trying to do my first automation. I have an Aeotec smart plug and I am monitoring the power usage which I am trying to use as a trigger. What I am expecting - when power usage goes above 100 Watts, a audio message to my Google speaker PLUS a message sent to my phone. The automation does not work as I expect and if I click on Debug > Trace Timeline, I see an error message:
Triggered manually at 28 June 2022, 18:21:51
Call service tts.google_say
Stopped because an error was encountered at 28 June 2022, 18:21:51 (runtime: 0.01 seconds)
extra keys not allowed @ data[‘cache_dir’]

I placed the code in to WAML Lint and it says 'Valid YAML. It says in the log file ‘Dryer has started turned on triggered by service automation.turn_on’
Can someone please help?"
Here is the code:

- id: "1655871927239"
  alias: Dryer has started
  description: Notify when the dryer has started
  trigger:
    - platform: numeric_state
      entity_id: sensor.aeotec_outlet_dryer_power_meter
      attribute: power
      above: "100"
  action:
    - service: tts.google_say
      data:
        entity_id: media_player.living_room_speaker
        message: Dryer has started
        cache: true
        cache_dir: /tmp/tts
  - service: notify.mobile_app_sm_s906e
    data:
      message: Dryer has started
      title: Laundry
  mode: single
2

Remove this:

        cache: true
        cache_dir: /tmp/tts

Not sure where you got this from. Never seen it being used

Was it from here? Text-to-Speech (TTS) - Home Assistant (home-assistant.io)

That is the configuration of the TTS.
Further down is the service call TTS: Text-to-Speech (TTS) - Home Assistant (home-assistant.io)

3

I think I got it from here - [Docs on tts google_say settings?]

I probably have those settings mixed up, would not surprise me. I will try without that and report back.

Thanks for helping BTW.

Edit: That fixed the messaging bit, both the Google speaker bit and to the mobile. Now I need to work on the trigger bit. That will be the next challenge and if I need help on that, I will start a new thread.

Thank you so much! I learnt something very valuable.

4

That is for configuring the TTS.
So kind of telling Home Assistant you want to be able to TTS.
That part does in the configuration.yaml

Then to actually do a TTS you do a service call you use the service created above and use that in script/automation or just a call service