Fatal error: Uncaught Error: Class "Monolog\Handler\AbstractHandler" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\monolog-bridge\Handler\ElasticsearchLogstashHandler.php:43 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\monolog-bridge\Handler\ElasticsearchLogstashHandler.php on line 43