Failed loading /usr/lib64/php/modules/ioncube_loader_lin_5.3.so: /usr/lib64/php/modules/ioncube_loader_lin_5.3.so: undefined symbol: execute
PHP Fatal error: Directive 'safe_mode' is no longer available in PHP in Unknown on line 0
There is no log file to attach, because none is generated. The task fails before Akeeba is able to write a log.
Manually running a backup from the Akeeba Control Panel works without issue. This only occurs during the CLI backup using:
/path/to/php /var/www/vhosts/siteroot/httpdocs/cli/akeeba-backup.php