Fatal error: Uncaught Error: Interface 'Symfony\Component\Debug\FatalErrorHandler\FatalErrorHandlerInterface' not found in /var/www/alldocs/home/sdoehner/webtest/simplesamlphp_idp/vendor/symfony/debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php:29 Stack trace: #0 {main} thrown in /var/www/alldocs/home/sdoehner/webtest/simplesamlphp_idp/vendor/symfony/debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php on line 29