Fatal error: Uncaught Error: Class "Monolog\Handler\AbstractHandler" not found in C:\xampp\htdocs\Backend_v.004\vendor\monolog\monolog\src\Monolog\Handler\SamplingHandler.php:33 Stack trace: #0 {main} thrown in C:\xampp\htdocs\Backend_v.004\vendor\monolog\monolog\src\Monolog\Handler\SamplingHandler.php on line 33