Fatal error: Uncaught Error: Class 'kartik\select2\ThemeAsset' not found in /app/vendor/kartik-v/yii2-widget-select2/src/ThemeKrajeeBs5Asset.php:18 Stack trace: #0 {main} thrown in /app/vendor/kartik-v/yii2-widget-select2/src/ThemeKrajeeBs5Asset.php on line 18