Fatal error: Uncaught Error: Call to undefined function add_action() in /srv/www/cntait.org/www/site.tree/public/wp-content/plugins/jetpack/modules/simple-payments/simple-payments.php:126 Stack trace: #0 /srv/www/cntait.org/www/site.tree/public/wp-content/plugins/jetpack/modules/simple-payments/simple-payments.php(84): Jetpack_Simple_Payments->register_init_hooks() #1 /srv/www/cntait.org/www/site.tree/public/wp-content/plugins/jetpack/modules/simple-payments/simple-payments.php(805): Jetpack_Simple_Payments::get_instance() #2 {main} thrown in /srv/www/cntait.org/www/site.tree/public/wp-content/plugins/jetpack/modules/simple-payments/simple-payments.php on line 126