https://bugs.winehq.org/show_bug.cgi?id=52782
--- Comment #6 from Jason holzminister@t-online.de --- I saw this on the valve issue tracker: I guess it is connected to this problem.
Handle ALG_ID_ECDH_P384 in BCryptGenerateKeyPair to make Anno 1800 Multiplayer work https://github.com/ValveSoftware/wine/issues/172