DuckDNS - Letsencrypt problem

I’ve installed the DuckDNS integration and it works with http OK when accessing from my phone. I forwarded port 8123 to the Pi on which HA is installed.

I added the recommended following lines to my configuration.yaml file, in order for HA to pick up the certs in /ssl (which are there):

  ssl_certificate: /ssl/fullchain.pem
  ssl_key: /ssl/privkey.pem

But on restarting HA, it refused to start and I had to ssh into the system and remove the lines I added, before it would start again.
I’d welcome any ideas, please!

Did it?

Or were you trying to access it via http?

Many thanks ‘tom_l)[¯_(ツ)_/¯’ - I was using http and the local address, rather than the DuckDNS one. It works OK now.

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You can also access via https://ip_address but you have to add a security exception to your web browser. The certificates are for the domain name, not the IP address. It’s cool, you know this one is safe.