I was going to ask if it's new content, but I see it doesn't work on any content on Netflix.
Surprised it's not being reported more, maybe location, although it does not work for me USA.
Maybe it's a temp Netflix issue?
"[Netflix]" handshake failed, will not analyze metainfo
ADDED: ok, it seems like a temp issue, it's working for me now. I did close and open SF a few times.