Fatal error: Uncaught Error: Call to undefined function add_action() in /home/handllu1/public_html/redboys/wp-content/plugins/simple-membership/views/payments/payment-gateway/admin_stripe_buy_now_button.php:5 Stack trace: #0 {main} thrown in /home/handllu1/public_html/redboys/wp-content/plugins/simple-membership/views/payments/payment-gateway/admin_stripe_buy_now_button.php on line 5