actually, that is not entirely correct an SSL handshake can be completed without that specific cypher.
There are in fact 37 different ones that TLS 1.2 could negotiate successfully.
This is a pretty good read on how it all works as well as offering some good reference details if you are interested.
I believe I’m kind aware how TLS works, which pointed me quiete quick to the root of the problem - TLS HS problem - I’ve seen couple of “Alert 40”. But definitely will go through the article - memory gets rusty over time, doen’t > 
Y