Fatal error: Uncaught Error: Class 'Nextend\SmartSlider3\Widget\Shadow\AbstractWidgetShadow' not found in C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\SmartSlider3\Widget\Shadow\ShadowImage\ShadowImage.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\SmartSlider3\Widget\Shadow\ShadowImage\ShadowImage.php on line 12