Unable to find service media_player.play_media

Getting this error with Google Say

homeassistant:
  packages: !include_dir_named packages
  external_url: https://xxxxxxxx.duckdns.org
  internal_url: https://192.168.0.15:8123

How I’m calling it as an action

    action:
      - service: notify.phones
        data_template:
          title: 'Update available:'
          message: >
            ...TEST
notify:
  - platform: tts
    name: phones
    tts_service: tts.google_say
    media_player: media_player.wooo
tts:
  - platform: google_translate
    service_name: google_say
Error executing service: <ServiceCall tts.google_say (c:124d6b244bb6bd840d88afce3e6da0cb): message=...TEST, entity_id=['media_player.wooo']>
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/core.py", line 1471, in catch_exceptions
    await coro_or_task
  File "/usr/src/homeassistant/homeassistant/core.py", line 1490, in _execute_service
    await handler.job.target(service_call)
  File "/usr/src/homeassistant/homeassistant/components/tts/__init__.py", line 183, in async_say_handle
    await hass.services.async_call(
  File "/usr/src/homeassistant/homeassistant/core.py", line 1405, in async_call
    raise ServiceNotFound(domain, service) from None
homeassistant.exceptions.ServiceNotFound: Unable to find service media_player.play_media

It’s true that the media player “wooo” doesn’t exist, but that’s because I just want it to generate an MP3 that I can use elsewhere. I use this exact method on another HA install and it works fine. I don’t think the error is related to the non existant wooo.

Actually it looks like it is simply because I’m trying to use the notify platform rather than straight to google_say which works…
I wonder how to get around this… seems strange! It definitely DID work until a couple of weeks ago.
I’m wondering if it’s a recently introduced ‘feature’ or change…

Maybe domain media_player (incl. services) it not loaded, until a valid media player is defined?

hmmm, but it works if I call it via google_say rather than the notify platform…