UPDATE:!!!!
i eliminated the "#" in front of the line "include /www/server/panel/vhost/rewrite/example.com.conf;" if not you may experience a constant error of 404 Not Found nginx. I suffered this alot, because in the making of this video (https://www.youtube.com/watch?v=WToZBDNMBks) , @WP Academy added that hash in front of the line, don't follow that!!! and yes!! WP ACADEMY THANKS ALOT FOR THE VIDEO