Fatal error: Uncaught Error: Class "Drupal\Core\Action\ConfigurableActionBase" not found in /home/qcsvlel/www/core/modules/user/src/Plugin/Action/ChangeUserRoleBase.php:18 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/user/src/Plugin/Action/ChangeUserRoleBase.php on line 18