Unable to change to domain's
It is done from within "centos" user:
[firstname.lastname@example.org] # cd /var/www/vhosts/example.com/httpdocs
-bash: cd: /var/www/vhosts/example.com/httpdocs: Permission Denied
Domain's directories can be accessed by a user domain belongs to or by root.
Access the server using root, or ftp user that the directory belongs to:
# su -