Fatal error: Uncaught Error: Class 'Drupal\Component\Plugin\Derivative\DeriverBase' not found in /var/www/html/tmp/contrib/group/modules/gnode/src/Plugin/GroupContentEnabler/GroupNodeDeriver.php:8 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/group/modules/gnode/src/Plugin/GroupContentEnabler/GroupNodeDeriver.php on line 8