Fatal error: Uncaught Error: Class 'yii\bootstrap4\Dropdown' not found in /home/trafqete/public_html/vendor/kartik-v/yii2-bootstrap4-dropdown/src/Dropdown.php:55 Stack trace: #0 {main} thrown in /home/trafqete/public_html/vendor/kartik-v/yii2-bootstrap4-dropdown/src/Dropdown.php on line 55