Fatal error: Uncaught Error: Class 'Elementor\Widget_Base' not found in C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\SmartSlider3\Platform\WordPress\Integration\Elementor\ElementorWidgetSmartSlider350.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\smart-slider-3\Nextend\SmartSlider3\Platform\WordPress\Integration\Elementor\ElementorWidgetSmartSlider350.php on line 11