Fatal error: Uncaught Error: Interface 'Buzz\Listener\ListenerInterface' not found in /home/lafaamicps/www/symfony/vendor/kriswallsmith/buzz/lib/Buzz/Listener/CallbackListener.php:9 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/kriswallsmith/buzz/lib/Buzz/Listener/CallbackListener.php on line 9