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-checkout.php:26 Stack trace: #0 /home/adaptyo3/public_html/wp-content/plugins/QUARENTINE/woocommerce-subscriptions/classes/class-wc-subscriptions-checkout.php(553): WC_Subscriptions_Checkout::init() #1 {main} thrown in /home/adaptyo3/public_html/wp-content/plugins/QUARENTINE/woocommerce-subscriptions/classes/class-wc-subscriptions-checkout.php on line 26