Validation error in xmlrpc.php

My link checker says
No validator could be found for
“http://archipelago.phrasewise.com/rsd”

This file needs to point to something else
in <?xml version="1.0" encoding="UTF-8"?><rsd version="1.0" xmlns="http://archipelago.phrasewise.com/rsd">

archipelago.phrasewise.com is just a parked page.