Scheduled backup not working for 4.40

Starting with the 4.4.0 version of XCloner I get following error messages in the logs when a scheduled backup is executed:

[2022-08-10 02:00:02] php_system.ERROR: E_ERROR: array (   
    'type' => 1,   
    'message' => 
    'Uncaught Error: Class "XCloner" not found in /home/.sites/122/site793/web/wp-content/plugins/xcloner-backup-and-restore/lib/Xcloner_Scheduler.php:272
    Stack trace: 
        #0 /home/.sites/122/site793/web/wp-content/plugins/xcloner-backup-and-restore/lib/Xcloner_Scheduler.php(469): Watchfulli\\XClonerCore\\Xcloner_Scheduler->_xcloner_scheduler_callback(\'2\', Array, \'\') 
        #1 /home/.sites/122/site793/web/wp-includes/class-wp-hook.php(307): Watchfulli\\XClonerCore\\Xcloner_Scheduler->xcloner_scheduler_callback(\'2\') 
        #2 /home/.sites/122/site793/web/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(\'\', Array) 
        #3 /home/.sites/122/site793/web/wp-includes/plugin.php(524): WP_Hook->do_action(Array) 
        #4 /home/.sites/122/site793/web/wp-cron.php(138): do_action_ref_array(\'xcloner_schedul...\', Array) 
        #5 {main}   thrown',   'file' => '/home/.sites/122/site793/web/wp-content/plugins/xcloner-backup-and-restore/lib/Xcloner_Scheduler.php',   'line' => 272, 
) [] []

I managed to get it running by changed the code in lib/Xcloner_Scheduler.php line 272 to:
$xcloner = new Xcloner();

Originally it was:
$xcloner = new \XCloner();