Fatal error: Uncaught Error: Interface 'Symfony\Component\HttpKernel\Controller\ArgumentValueResolverInterface' not found in /var/www/alldocs/home/sdoehner/webtest/simplesamlphp_idp/vendor/symfony/http-kernel/Controller/ArgumentResolver/VariadicValueResolver.php:23 Stack trace: #0 {main} thrown in /var/www/alldocs/home/sdoehner/webtest/simplesamlphp_idp/vendor/symfony/http-kernel/Controller/ArgumentResolver/VariadicValueResolver.php on line 23