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