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