The reason is in versions 4.0.0+ and Foam Fix, because everything worked on 3.9.7, but I can't roll back because of the hard binding to the Lumi, RPLE, SwanSong mod complex. Yes, as you advised, I ...

is presumably the one in the title - missing sun/security/ssl/SupportedEllipticCurvesExtension. It worked some days ago, then we changed the install scripts a bit and ...