Fatal error: Uncaught Error: Class 'Drupal\Core\Entity\Routing\DefaultHtmlRouteProvider' not found in /var/www/html/tmp/contrib/group/src/Entity/Routing/GroupTypeRouteProvider.php:11 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/group/src/Entity/Routing/GroupTypeRouteProvider.php on line 11