Fatal error: Uncaught Error: Class 'Twig\Extension\AbstractExtension' not found in /var/www/html/simplesamlphp/vendor/twig/intl-extra/IntlExtension.php:28
Stack trace:
#0 {main}
  thrown in /var/www/html/simplesamlphp/vendor/twig/intl-extra/IntlExtension.php on line 28