Fatal error: Uncaught Error: Class "League\CommonMark\Node\Node" not found in C:\WebServer\htdocs\bookshelf\vendor\league\commonmark\src\Node\Block\AbstractBlock.php:27 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\league\commonmark\src\Node\Block\AbstractBlock.php on line 27