Fatal error: Uncaught Error: Call to undefined function add_action() in /home/adaptyo3/public_html/wp-content/plugins/QUARENTINE/woocommerce-subscriptions/classes/class-wc-subscriptions-change-payment-gateway.php:29 Stack trace: #0 /home/adaptyo3/public_html/wp-content/plugins/QUARENTINE/woocommerce-subscriptions/classes/class-wc-subscriptions-change-payment-gateway.php(521): WC_Subscriptions_Change_Payment_Gateway::init() #1 {main} thrown in /home/adaptyo3/public_html/wp-content/plugins/QUARENTINE/woocommerce-subscriptions/classes/class-wc-subscriptions-change-payment-gateway.php on line 29