Fatal error: Uncaught Error: Class 'Nextend\SmartSlider3\Generator\AbstractGeneratorGroup' not found in C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\SmartSlider3\Generator\WordPress\Posts\GeneratorGroupPosts.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\SmartSlider3\Generator\WordPress\Posts\GeneratorGroupPosts.php on line 11