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