I'm in the same boat here. I've been trying workarounds for a while and it was working just fine yesterday. Currently there appears to be an issue with the connection between us and them. We need a response to this as this prevents us from playing the game due to things out of our control(ISP is fine; SSL issues are not prevalent, FFXIVBOOT.cfg is not an issue, et cetera).

I don't know how widespread it is, but hopefully we can get a fix for this soon.