Fatal error: Uncaught Error: Interface 'League\CommonMark\Extension\ExtensionInterface' not found in /var/www/html/burs/vendor/league/commonmark/src/Extension/GithubFlavoredMarkdownExtension.php:23 Stack trace: #0 {main} thrown in /var/www/html/burs/vendor/league/commonmark/src/Extension/GithubFlavoredMarkdownExtension.php on line 23