Fatal error: Uncaught Error: Interface 'League\CommonMark\Output\RenderedContentInterface' not found in C:\Apache24\htdocs\vendor.old2\league\commonmark\src\Output\RenderedContent.php:18 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor.old2\league\commonmark\src\Output\RenderedContent.php on line 18