- Plesk Onyx for Linux
Scheduled FTP backups are not rotated. In the backup log file like
/usr/local/psa/PMM/logs/backup-2017-03-29-07-31-10-590/backup.log, the following message appears:
Error 31 FTP: command REST failed
Curl error: (31) FTP: command REST failed: Last FTP request: REST 195307: Last FTP response: 501 Resuming transfers not allowed
If update is not possible for some reason you may try the following
Install the latest Plesk micro-updates.
As a workaround, enable REST command at the FTP server.