Fatal error: Uncaught Error: Class 'Symfony\Bundle\FrameworkBundle\Console\Descriptor\Descriptor' not found in /var/www/html/simplesamlphp/vendor/symfony/framework-bundle/Console/Descriptor/XmlDescriptor.php:34
Stack trace:
#0 {main}
  thrown in /var/www/html/simplesamlphp/vendor/symfony/framework-bundle/Console/Descriptor/XmlDescriptor.php on line 34