If you get this error while adding domain in plesk control panel
Details: The operation completed successfully. (Error code 0) at Unable to copy directory C:\inetpub\vhosts\.skel\0 to the vhost C:\inetpub\vhosts\domainname.com
at (Skeleton::Setup line 116)
you will need to rename folder C:\inetpub\vhosts\.skel\0 to _0 and create new blank folder 0 and restart plesk and IIS and then you can create domain
without any proble.