Fatal error: Uncaught Error: Interface 'Psr\EventDispatcher\EventDispatcherInterface' not found in /home/wwseve/public_html/amostra/vendor/symfony/event-dispatcher-contracts/EventDispatcherInterface.php:19 Stack trace: #0 {main} thrown in /home/wwseve/public_html/amostra/vendor/symfony/event-dispatcher-contracts/EventDispatcherInterface.php on line 19