Fatal error: Uncaught Error: Interface 'League\Event\ListenerInterface' not found in /home/kubalos2/public_html/testtestowy/vendor/league/event/src/CallbackListener.php:5 Stack trace: #0 {main} thrown in /home/kubalos2/public_html/testtestowy/vendor/league/event/src/CallbackListener.php on line 5