Fatal error: Uncaught Error: Class 'Twig\Loader\FilesystemLoader' not found in /var/www/html/simplesamlphp/src/SimpleSAML/XHTML/TemplateLoader.php:17
Stack trace:
#0 {main}
  thrown in /var/www/html/simplesamlphp/src/SimpleSAML/XHTML/TemplateLoader.php on line 17