Fatal error: Uncaught Error: Class 'Nextend\Framework\Database\Database' not found in C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\Framework\Model\Section.php:16 Stack trace: #0 C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\Framework\Model\Section.php(176): Nextend\Framework\Model\Section->__construct() #1 {main} thrown in C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\Framework\Model\Section.php on line 16