Fatal error: Uncaught Error: Interface 'League\CommonMark\Block\Parser\BlockParserInterface' not found in /home/kingelearn/public_html/vendor/league/commonmark/src/Extension/TableOfContents/TableOfContentsPlaceholderParser.php:21 Stack trace: #0 {main} thrown in /home/kingelearn/public_html/vendor/league/commonmark/src/Extension/TableOfContents/TableOfContentsPlaceholderParser.php on line 21