I try to send a SOAP-loginRequest to the POA and always get Status Code 59943.

<?xml version="1.0" encoding="UTF-8"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<types:auth type="types:PlainText">
<application>Time Connector</application>

When I send a getItemsRequest, it's the same problem.
My requests seems to be valid, because when they are invalid, I get other status codes.
The other error codes usually also come with a description, for example code 59905 has the description "Bad parameter passed to a NCSP function". But the code 59943, which I cannot find any info about, comes without a description.

Please, what does code 59943 mean?

Thank you!