Warning: include_once(/blog/wp-includes/class-IXR.php): failed to open stream: No such file or directory in /blog/xmlrpc.php on line 55

Warning: include_once(): Failed opening '/blog/wp-includes/class-IXR.php' for inclusion (include_path='.:') in /blog/xmlrpc.php on line 55

Fatal error: Class 'IXR_Server' not found in /blog/xmlrpc.php on line 115