Fatal error: Uncaught Error: Interface "League\CommonMark\Extension\ExtensionInterface" not found in /users/danielstruebig/www/familyhelper/vendor/league/commonmark/src/Extension/Highlight/HighlightExtension.php:19 Stack trace: #0 {main} thrown in /users/danielstruebig/www/familyhelper/vendor/league/commonmark/src/Extension/Highlight/HighlightExtension.php on line 19