Fatal error: Uncaught Error: Class "Monolog\Handler\AbstractProcessingHandler" not found in C:\xampp\htdocs\Backend_v.004\vendor\monolog\monolog\src\Monolog\Handler\ElasticaHandler.php:37 Stack trace: #0 {main} thrown in C:\xampp\htdocs\Backend_v.004\vendor\monolog\monolog\src\Monolog\Handler\ElasticaHandler.php on line 37