Error message when usiing TTS on Google Home Mini

Configuration
1

On hassio, whenever I try to use TTS on Google Home Mini, all I get is a ‘plink’, rather than the spoken message. Checking the Developer Tool Logs, I get the following error. Can anyone help with diagnosing this?

Screenshot from 2019-12-20 18-54-16
Screenshot from 2019-12-20 18-54-16774×453 24.2 KB

2

I’ve answered my own question but will leave it here if it helps others.

I’m not sure if both these changes were required, but I know the second one definitely was.

  • I added the add-on Google Assistant SDK (I don’t think this was needed)

  • I commented out the http entries in configuration.yaml. I suspect this is where the problem was, as for a time I was using DuckDNS, which uses a Let’s Encrypt certificate, therefore making local access https and I think it is the SSL that was causing the problem. I no longer use DuckDNS, as I have Home Assistant Cloud.