Fatal error: Uncaught Error: Class "Nextend\Framework\View\AbstractBlock" not found in /var/www/andovercg/staging/wp-content/plugins/smart-slider-3/Nextend/SmartSlider3/Application/Admin/Layout/Block/Slider/SliderBox/BlockSliderBox.php:10 Stack trace: #0 {main} thrown in /var/www/andovercg/staging/wp-content/plugins/smart-slider-3/Nextend/SmartSlider3/Application/Admin/Layout/Block/Slider/SliderBox/BlockSliderBox.php on line 10