Fatal error: Uncaught Error: Class 'Nextend\SmartSlider3\Application\Admin\Layout\Block\Slider\SliderBox\BlockSliderBox' not found in C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\SmartSlider3\Application\Admin\Slider\Template\AjaxSliderBox.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\SmartSlider3\Application\Admin\Slider\Template\AjaxSliderBox.php on line 12