Fatal error: Uncaught Error: Class "kartik\base\Widget" not found in /home/apolo/public_html/qua_sgdpr/vendor/kartik-v/yii2-popover-x/PopoverX.php:38 Stack trace: #0 {main} thrown in /home/apolo/public_html/qua_sgdpr/vendor/kartik-v/yii2-popover-x/PopoverX.php on line 38