Fatal error: Uncaught Error: Class "Nextend\Framework\Form\Element\AbstractFieldHidden" not found in /var/www/andovercg/staging/wp-content/plugins/smart-slider-3/Nextend/SmartSlider3/Form/Element/WidgetArea.php:11
Stack trace:
#0 {main}
thrown in /var/www/andovercg/staging/wp-content/plugins/smart-slider-3/Nextend/SmartSlider3/Form/Element/WidgetArea.php on line 11