404 with subdomain in plesk

I installed wordpress in multisite mode without problem and followed the procedure on this page (https://codex.www.ads-software.com/Configuring_Wildcard_Subdomains_for_multi_site_under_Plesk_Control_Panel) for using subdomain with plesk pannel, but something must went wrong because i get a 404 if i try to login to one of the subdomain-website and i see the plesk splash page if i visit the front end.

The main site work just fine, both front and backend.

Any clue?