Warning: main(/html/wp-admin/includes/admin.php): failed to open stream: No such file or directory in /html/xmlrpc.php on line 54

Warning: main(): Failed opening '/html/wp-admin/includes/admin.php' for inclusion (include_path='.:/usr/share/php/pear:./usr/share/php/pear/PEAR') in /html/xmlrpc.php on line 54
XML-RPC server accepts POST requests only.