API dkim_selector_error in mail_domain_add ()

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"><SOAP-ENV:Body><SOAP-ENV:Fault><faultcode>data_processing_error</faultcode><faultstring>dkim_selector_error&lt;br /&gt;&#13;
</faultstring></SOAP-ENV:Fault></SOAP-ENV:Body></SOAP-ENV:Envelope>
dkim_selector_error<br />