Plesk backup fails with error: Site does not exist at IIS7WebSites

Symptoms

Plesk backup fails with one of the following errors:

PLESK_ERROR: Site domain.tld does not exist at IIS7WebSites

PLESK_ERROR: WARNING: (Restore hosting object 'example.com') psadumpagent.UtilExecutionException: Error in execute ''C:\Program Files (x86)\Plesk\admin\bin64\websrvmng' --set-mime-types "--vhost-name=example.com" "--mime-types=C:\Program Files (x86)\Plesk\PrivateTemp\tmp9564.tmp"': Site example.com doesn't exist

Cause

The error message means that "example.com" is absent in IIS or is not configured in IIS.

Resolution

The site needs to be configured using the following commands from the command line in RDP session:

For Plesk 12.5 and newer:

C:\> plesk repair web example.com

For Plesk 11.x

C:\> "%plesk_bin%\\websrvmng.exe" --reconfigure-vhost --vhost-name=example.com