Fatal error: Uncaught Error: Class 'League\CommonMark\Event\AbstractEvent' not found in /var/www/html/test-project/my-app/vendor/league/commonmark/src/Event/DocumentParsedEvent.php:21 Stack trace: #0 {main} thrown in /var/www/html/test-project/my-app/vendor/league/commonmark/src/Event/DocumentParsedEvent.php on line 21