Fatal error: Uncaught Error: Call to undefined function MasterAddons\Modules\add_action() in /var/www/html/wordpress/wp-content/plugins/master-addons/inc/modules/bg-slider/bg-slider.php:16 Stack trace: #0 /var/www/html/wordpress/wp-content/plugins/master-addons/inc/modules/bg-slider/bg-slider.php(370): MasterAddons\Modules\JLTMA_Extension_Background_Slider->__construct() #1 /var/www/html/wordpress/wp-content/plugins/master-addons/inc/modules/bg-slider/bg-slider.php(376): MasterAddons\Modules\JLTMA_Extension_Background_Slider::get_instance() #2 {main} thrown in /var/www/html/wordpress/wp-content/plugins/master-addons/inc/modules/bg-slider/bg-slider.php on line 16