Since there are eyes on this thread: Has anyone successfully linked their HA Cloud account with Alexa? I keep on getting "We were unable to link Home Assistant at this time."
We're working with Amazon support in trying to pin down why this is happening but the support response time is slow. Our end looks all fine and the majority of people are able to link their account.
You can try some of these troubleshooting steps[1]. If you are on Twitter or Discord, PM me (@balloob) your username and an exact timestamp that linking failed so I can forward it as another example to Amazon.
Have been using https://www.home-assistant.io/components/emulated_hue/ for sometime. It does not use HA Cloud though (not required actually).
With this, all the components registered in HA are emulated as hue devices for Alexa.
Note: I use Echo Plus, which has the abilities to discover devices. Not sure if this works with Echo or Dot.
I found the troubleshooting section really helpful, especially the part about exposing a single entry when linking with Alexa. Once I did that I successfully linked the two.
You can try some of these troubleshooting steps[1]. If you are on Twitter or Discord, PM me (@balloob) your username and an exact timestamp that linking failed so I can forward it as another example to Amazon.
[1]: https://twitter.com/clstokes/status/1019039457339535360