Czesc Tomasz, yep it was the case, I provided domain instead of Netlify unique internal site name, and then it worked, however there is two other problems:
– it ignores subfolder I wanted to use Publii for blog and output it to the site.com/blog folder, but it’s ignored the path and outputted it to the main site
– it also lost all the credentials 🙁 and require them to be provided again (after successful deployment)