Alexa developer console authorization

Hi everybody,I swapped from api password to new authorization method.
I use Nabu Casa cloud.
While trying to use my custom Alexa skills, I found that Alexa doesn’t connect to Hassio, clearly due to the change in the login system.

What am I expected to do to have that access again?

Thx

Take a look at the docs for setting up Alexa with the Nabu Casa Cloud here

That’s not the problem. Alexa integration is ok, I can see all the entities. The problem turns on when I submit an intent. The skill is ok but the Alexa developer console cannot log in HA.
Just to add some info: the error given in the notification panel is:
Login attempt or request with invalid authentication from 54.240.197.98