PluXml has been added to work in progress apps

Yes it is, the workaround for now is to add the domain name to the server’s /etc/hosts, so that it knows what resolve the domain.

Have a look here: https://github.com/abeudin/wordpress_ynh/blob/master/scripts/install#L75

And don’t forget to remove it: https://github.com/abeudin/wordpress_ynh/blob/master/scripts/install#101