Fatal error, queue doesn't run either

Quote

PHP Fatal error:  Declaration of IPS\core\widgets\_recentStatusUpdates::configuration(&$form = null) must be compatible with IPS\Widget::configuration(?IPS\Helpers\Form &$form = null): IPS\Helpers\Form in /app/applications/core/widgets/recentStatusUpdates.php on line 68

Local test update, the forum doesn't display and queue doesn't run due to this error. No 3rd party stuff enabled