'ERROR code expired' in Alexa virtual Home interface

Hi,
I am trying to configure the Alexa node, but when I try to create the connection and the verification code comes out, after only 4/5 seconds the message 'ERROR code expired' appears, and even if I manage to authorize the code first, I get the same error.
I tried several times, in some cases the connection is created, but then it doesn't work anyway.
I have already installed and authorized the skill.
I have already one connection set up for node-red-contrib-alexa-remote2-applestrudel

Thanks for your help

Andreas