Hi William1,

Unfortunately the additional log didn't give us enough information to figure out what is going on with the TLS/SSL handshake.

At this point, the log that could be useful is the Java SSL debug logging, to dissect the details of the TLS handshake algorithm TLS, not of the competence of Lightstreamer.
You could launch a Lightstreamer server after adding the -Djavax.net.debug=ssl:handshake:verbose parameter to the java call (editing the LS.bat file in the bin folder).
The log of the outcome of TLS handshake will be printed in the Server console log.

Regards,
Giuseppe