Fatal error: Uncaught Error: Interface 'League\CommonMark\Extension\ExtensionInterface' not found in /var/www/html/btest1.ledaco.net/public_html/external/vendor/league/commonmark/src/Extension/Strikethrough/StrikethroughExtension.php:17 Stack trace: #0 {main} thrown in /var/www/html/btest1.ledaco.net/public_html/external/vendor/league/commonmark/src/Extension/Strikethrough/StrikethroughExtension.php on line 17