Fatal error: Uncaught Error: Class "League\CommonMark\Node\Block\AbstractBlock" not found in /opt/lampp/htdocs/forum/flarum/vendor/league/commonmark/src/Extension/Attributes/Node/Attributes.php:19 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/league/commonmark/src/Extension/Attributes/Node/Attributes.php on line 19