Fatal error: Uncaught Error: Class 'yii\widgets\ActiveField' not found in /var/www/html/ucetnik/vendor/yiisoft/yii2-bootstrap/src/ActiveField.php:91 Stack trace: #0 {main} thrown in /var/www/html/ucetnik/vendor/yiisoft/yii2-bootstrap/src/ActiveField.php on line 91