- Plesk for Linux
During the backup, the following error message appears for a subscription which has no permissions on backup and restoration of subscription data from server storage.
Unable to perform a backup under subscription: Some fields are empty or contain an improper value.
Proper message should be:
Error: Only the FTP storage is allowed for backups but its settings are not specified. Configure the FTP storage first.
This is Plesk bug with ID #PPPM-6021 which is planned to be fixed in future Plesk updates.
Currently, there is no workaround.