Hi,
what happens if you restart the bundle once openhab is up and running?
Have you re-authenticated your Google tts service after upgrading?
I wouldn’t say that your warning is what prevents your Google tts from working, as it should just retry connecting…
Be sure to use Desktop as target when you generate your client ID in the Google dev console: OH3 Google TTS: Error - grant type authorization_code
All the best
Bob