Fatal error: Uncaught Error: Call to undefined function register_activation_hook() in /usr/local/www/wordpress/wp-content/plugins/stop-xmlrpc-attack/stop-xmlrpc-attack.php:31 Stack trace: #0 /usr/local/www/wordpress/wp-content/plugins/stop-xmlrpc-attack/stop-xmlrpc-attack.php(360): Plugin_Stop_Xmlrpc_Attack->__construct() #1 {main} thrown in /usr/local/www/wordpress/wp-content/plugins/stop-xmlrpc-attack/stop-xmlrpc-attack.php on line 31