Fatal error: Uncaught Error: Interface 'League\CommonMark\Block\Element\StringContainerInterface' not found in C:\xampp\htdocs\admin\vendor\league\commonmark\src\Block\Element\InlineContainerInterface.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\league\commonmark\src\Block\Element\InlineContainerInterface.php on line 17