Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/piercingowelove/public_html/piercingowelove/wp-content/themes/customify/inc/customizer/configs/background.php:6 Stack trace: #0 /home/piercingowelove/public_html/piercingowelove/wp-content/themes/customify/inc/customizer/configs/background.php(94): Customify_Advanced_Styling_Background->__construct() #1 {main} thrown in /home/piercingowelove/public_html/piercingowelove/wp-content/themes/customify/inc/customizer/configs/background.php on line 6