Fatal error: Uncaught Error: Class 'League\CommonMark\Event\AbstractEvent' not found in /opt/lampp/htdocs/us/vendor/league/commonmark/src/Event/DocumentParsedEvent.php:19 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/us/vendor/league/commonmark/src/Event/DocumentParsedEvent.php on line 19