Fatal error: Uncaught Error: Class 'Symfony\Component\Console\Descriptor\Descriptor' not found in C:\xampp\htdocs\admin\vendor\symfony\console\Descriptor\MarkdownDescriptor.php:29 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\symfony\console\Descriptor\MarkdownDescriptor.php on line 29