Fatal error: Uncaught Error: Class 'yii\base\Model' not found in /var/www/up.tantal-metall.com/yii_up/vendor/yiisoft/yii2-bootstrap5/tests/data/Singer.php:12 Stack trace: #0 {main} thrown in /var/www/up.tantal-metall.com/yii_up/vendor/yiisoft/yii2-bootstrap5/tests/data/Singer.php on line 12