Over the pre-Test stage of the vCenter update or update, during the vSphere Client and logs, you would possibly see an mistake including: This phase is optional: operate the subsequent command to validate the web hosting description file: %plesk_dir%adminplibmodulespanel-migratorbackendplesk-migrator.bat validate Resolution: You should Get in touch with the plug-in vendor https://www.hostscheap.com/plesk-migration-service