Alexa custom Skill issue: timeout

I want to link my Alexa with HASS. I am following this guide: Amazon Alexa Custom Skill - Home Assistant

I have an IPv6 only internet connection. I set up DuckDNS account and Let’s encrypt certificate in order to make HASS accessible via https://xyz.duckdns.org:433 (confirmed access via my mobile)

The environment variable NOT_VERIFY_SSL is set to True.

Testing the Lamda-Function throws the error Task timed out after 3.01 seconds.

Any ideas how to fix the issue? Thanks for your support!

Im personally finding it very flakey, I can have a request work and then 5 sec later im getting timeouts.

In the lambda, make sure you have the variables set - debug set to True and LONG_LIVED_ACCESS_TOKEN set. You should be able to press TEST and get a response back listing your devices
Also try using the Nginx Proxy Manager addin and I found when I had Cloudflare as my name server I could not get any connections though at all.

Thanks for your reply.

I ended up in requesting my ISP to enable IPv4 (which he did very easy) and after doing this, everything worked like a charm.