Fatal error: Uncaught Error: Interface "League\CommonMark\Block\Parser\BlockParserInterface" not found in D:\Apache24\www\pda\vendor\league\commonmark\src\Extension\TableOfContents\TableOfContentsPlaceholderParser.php:21 Stack trace: #0 {main} thrown in D:\Apache24\www\pda\vendor\league\commonmark\src\Extension\TableOfContents\TableOfContentsPlaceholderParser.php on line 21