Fatal error: Uncaught Error: Call to undefined function add_action() in /home/adaptyo3/public_html/wp-content/plugins/QUARENTINE/woocommerce-subscriptions/lib/action-scheduler/action-scheduler.php:15 Stack trace: #0 {main} thrown in /home/adaptyo3/public_html/wp-content/plugins/QUARENTINE/woocommerce-subscriptions/lib/action-scheduler/action-scheduler.php on line 15