These are last relevant messages taken from the backup log:
—-
[2018-02-15 18:09:01] xcloner_archive.INFO: Closing the backup archive backup_fw2s.com-2018-02-15_18-08-sql-2767e.tgz with 2*512 zero bytes blocks. [] []
[2018-02-15 18:09:01] xcloner_scheduler.INFO: File archive process FINISHED. [“CRON”] []
[2018-02-15 18:09:01] xcloner_archive.INFO: Sending backup notification to [email protected] [] []
[2018-02-15 18:09:01] xcloner_file_system.INFO: Cleaning the backup storage on matching rules [] []
[2018-02-15 18:09:01] xcloner_file_system.INFO: Deleting backup backup_fw2s.com-2018-02-10_07-01-sql-2dcd5.tgz matching rule [“BACKUP QUANTITY LIMIT”,”1 >= 2″] []
[2018-02-15 18:09:01] php_system.INFO: E_WARNING: array ( ‘type’ => 2, ‘message’ => ‘A non-numeric value encountered’, ‘file’ => ‘/home/fw2scom0/public_html/wp-content/plugins/xcloner-backup-and-restore/vendor/league/flysystem/src/Adapter/Local.php’, ‘line’ => 424, ) [] []
[2018-02-15 18:09:01] php_system.INFO: E_WARNING: array ( ‘type’ => 2, ‘message’ => ‘A non-numeric value encountered’, ‘file’ => ‘/home/fw2scom0/public_html/wp-content/plugins/xcloner-backup-and-restore/vendor/league/flysystem/src/Adapter/Local.php’, ‘line’ => 424, ) [] []
—-
Note: the backup finishes correctly, warning messages appear after deleting old backups (that finishes correctly, too).