Symptoms
Site cannot be published, the following error is shown in Sitebuilder Wizard:The site has been published with errors.
Cannot update modules data.
Cause
The problem is caused by NFS locking.Configuration of Sitebuilder modules is stored in SQLite database on publishing host. The file is located at /data/storage/sb_modules.php under publishing location. When you edit site in Sitebuilder Wizard or if site is published Parallels Plesk Sitebuilder locks the SQLite database file and then edits it.
If publishing host is mounted as NFS file system locking is not possible by default. This causes Parallels Plesk Sitebuilder is unable to work with SQLite database and the error occurs.