Fatal error: Uncaught Error: Call to undefined function add_action() in /home/wapanorg/public_html/wp-content/themes/restoneu-ex/upsell/class-customize.php:48 Stack trace: #0 /home/wapanorg/public_html/wp-content/themes/restoneu-ex/upsell/class-customize.php(23): restoneu_Customize_Upsell->setup_actions() #1 /home/wapanorg/public_html/wp-content/themes/restoneu-ex/upsell/class-customize.php(101): restoneu_Customize_Upsell::get_instance() #2 {main} thrown in /home/wapanorg/public_html/wp-content/themes/restoneu-ex/upsell/class-customize.php on line 48