Fatal error: Uncaught Error: Call to undefined function add_shortcode() in /home/workings/public_html/hidden/wp-content/plugins/fusion-core/shortcodes/class-fusion-lightbox.php:11 Stack trace: #0 /home/workings/public_html/hidden/wp-content/plugins/fusion-core/shortcodes/class-fusion-lightbox.php(27): FusionSC_FusionLightbox->__construct() #1 {main} thrown in /home/workings/public_html/hidden/wp-content/plugins/fusion-core/shortcodes/class-fusion-lightbox.php on line 11