https://bugs.winehq.org/show_bug.cgi?id=40788
--- Comment #4 from Bruno Jesus 00cpxxx@gmail.com --- Created attachment 54719 --> https://bugs.winehq.org/attachment.cgi?id=54719 hack
This problem is also present in BSD like systems, please try the attached patch.
Hopefully it is just complaining about the SO_SNDBUF error return, this would not be the first time we see a game relying on such mechanics.