Error - can't link account in Alexa App

I followed DrZzs video to install Haaska for Alexa. Everything seemed to go OK. When I run the test at the end, I get data that shows devices installed in my Home Assistant. So it appears all the AWS/Alexa development stuff went OK since it seems to have connected and found devices.

When I go to the Alexa app on my Android phone and try to “Enable to use” - after a bit, I get a message “Unable to link haaska with Alexa” and then a Development Tip: "The authorization server returned with an ‘error’ parameter.

I’m stumped. Don’t know what to do.

I am having the same issue. Were you able to get it resolved?