Fatal error: Uncaught Error: Interface 'Twig\Extension\RuntimeExtensionInterface' not found in /var/www/html/simplesamlphp/vendor/symfony/twig-bridge/Extension/SerializerRuntime.php:20
Stack trace:
#0 {main}
  thrown in /var/www/html/simplesamlphp/vendor/symfony/twig-bridge/Extension/SerializerRuntime.php on line 20