Fatal error: Uncaught Error: Class 'Monolog\Handler\AbstractProcessingHandler' not found in /home/benjamincb/demos/acdg-site/vendor/symfony/monolog-bridge/Handler/MailerHandler.php:25 Stack trace: #0 {main} thrown in /home/benjamincb/demos/acdg-site/vendor/symfony/monolog-bridge/Handler/MailerHandler.php on line 25