Fatal error: Uncaught Error: Class 'yii\bootstrap4\Widget' not found in /opt/lampp/htdocs/restaurante.apirest/vendor/yiisoft/yii2-bootstrap4/src/ButtonToolbar.php:53 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/restaurante.apirest/vendor/yiisoft/yii2-bootstrap4/src/ButtonToolbar.php on line 53