Fatal error: Uncaught Error: Class 'League\CommonMark\Node\Inline\AbstractInline' not found in D:\xampp\htdocs\psp\backend\vendor\league\commonmark\src\Extension\HeadingPermalink\HeadingPermalink.php:21 Stack trace: #0 {main} thrown in D:\xampp\htdocs\psp\backend\vendor\league\commonmark\src\Extension\HeadingPermalink\HeadingPermalink.php on line 21