Fatal error: Uncaught Error: Class "League\CommonMark\Node\Block\AbstractBlock" not found in C:\xampp\htdocs\rampcheckv3\vendor\league\commonmark\src\Extension\CommonMark\Node\Block\Heading.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\rampcheckv3\vendor\league\commonmark\src\Extension\CommonMark\Node\Block\Heading.php on line 21