Fatal error: Uncaught Error: Class "Monolog\Handler\AbstractProcessingHandler" not found in C:\xampp\htdocs\ojs\lib\pkp\lib\vendor\monolog\monolog\src\Monolog\Handler\CubeHandler.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ojs\lib\pkp\lib\vendor\monolog\monolog\src\Monolog\Handler\CubeHandler.php on line 24