Firstly, this seems like a problem with Mono not cRPG but it might still be useful to ask here.
I can run Warband and cRPG pretty well on Linux under Wine, but if I tick the WSE2 beta box then try to play, the download bars complete as usual but then it gets stuck on "checking for WSE2 beta update" and will show
this error message.
Does anyone know anything about this sort of thing? I'm pretty sure I talked to someone in game who was running WSE2 fine under Linux.
For now I'll have to keep rebooting into Windows.