Fatal error: Uncaught Error: Interface 'Drupal\Core\Extension\ModuleUninstallValidatorInterface' not found in /var/www/html/tmp/contrib/group/src/UninstallValidator/GroupContentUninstallValidator.php:12 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/group/src/UninstallValidator/GroupContentUninstallValidator.php on line 12