Fatal error: Uncaught Error: Class "League\CommonMark\Block\Element\AbstractBlock" not found in C:\Apache24_x64\htdocs\ex-vak\vendor\league\commonmark\src\Extension\Attributes\Node\Attributes.php:20 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\ex-vak\vendor\league\commonmark\src\Extension\Attributes\Node\Attributes.php on line 20