Fatal error: Uncaught Error: Class "Monolog\Handler\AbstractHandler" not found in /var/www/crm_killing_ninja/vendor/symfony/monolog-bridge/Handler/ElasticsearchLogstashHandler.php:47 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/vendor/symfony/monolog-bridge/Handler/ElasticsearchLogstashHandler.php on line 47