Fatal error: Class 'Symfony\Component\Console\Descriptor\Descriptor' not found in /var/www/html/dev/spa/vendor/symfony/console/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php on line 26

Call Stack:
    0.0011     272584   1. {main}() /var/www/html/dev/spa/vendor/symfony/console/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php:0