Fatal error: Uncaught Error: Call to undefined function add_action() in /home/www/act.com.cy/wp-content/plugins/jetpack/modules/simple-payments/simple-payments.php:42 Stack trace: #0 /home/www/act.com.cy/wp-content/plugins/jetpack/modules/simple-payments/simple-payments.php(25): Jetpack_Simple_Payments->register_init_hooks() #1 /home/www/act.com.cy/wp-content/plugins/jetpack/modules/simple-payments/simple-payments.php(677): Jetpack_Simple_Payments::getInstance() #2 {main} thrown in /home/www/act.com.cy/wp-content/plugins/jetpack/modules/simple-payments/simple-payments.php on line 42