Fatal error: Uncaught Error: Call to undefined function add_action() in /home/helllcom/public_html/wp-content/themes/ro/library/ro-package-discounts.php:13 Stack trace: #0 /home/helllcom/public_html/wp-content/themes/ro/library/ro-package-discounts.php(8): ROPackageDiscounts->register_hooks() #1 /home/helllcom/public_html/wp-content/themes/ro/library/ro-package-discounts.php(60): ROPackageDiscounts->__construct() #2 {main} thrown in /home/helllcom/public_html/wp-content/themes/ro/library/ro-package-discounts.php on line 13