Fatal error: Uncaught Error: Class 'Drupal\Core\Entity\Plugin\EntityReferenceSelection\DefaultSelection' not found in /var/www/html/tmp/contrib/group/src/Plugin/EntityReferenceSelection/GroupTypeRoleSelection.php:21 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/group/src/Plugin/EntityReferenceSelection/GroupTypeRoleSelection.php on line 21