Yep, looks like a hotfix was rolled out, just tried it again and it downloaded a lobby_coop.cop file and a bunch of other files despite having patched it yesterday.

@axel12

I'm getting the same thing. I have this warning in my game.log:

info: GPGNET: setting nat handler to 0x11dda004
info: LOBBY: Game port 57575[UDP] opened.
info: LOBBY: starting with local uid of 38070 [Cmdrd]
info: GPGNET: entering lobby state.
info:  { }
info:  { }
debug: Loading module '\000/lua/maui/effecthelpers.lua\000'
info: Supreme Commander: Forged Alliance version 3716
debug: Loading module '\000/lua/ui/lobby/chatarea.lua\000'
debug: Loading module '\000/lua/maui/statusbar.lua\000'
debug: Loading module '\000/lua/ui/controls/columnlayout.lua\000'
warning: Error running Hosting script in CScriptObject at 11278000: ...ta\faforever\gamedata\lua.nx2\lua\ui\lobby\lobby.lua(6788): attempt to call method `Hide' (a nil value)
         stack traceback:
         	...ta\faforever\gamedata\lua.nx2\lua\ui\lobby\lobby.lua(6788): in function `CreateUI'
         	...ta\faforever\gamedata\lua.nx2\lua\ui\lobby\lobby.lua(4931): in function <...ta\faforever\gamedata\lua.nx2\lua\ui\lobby\lobby.lua:4828>
         	[C]: in function `HostGame'
         	...ta\faforever\gamedata\lua.nx2\lua\ui\lobby\lobby.lua(702): in function <...ta\faforever\gamedata\lua.nx2\lua\ui\lobby\lobby.lua:698>
info: Minimized true
info: Minimized false
info: Minimized true
info: Minimized false
info: GPGNET: setting nat handler to 0x00000000
info: CNetTCPBuf::Read(): recv() failed: WSAEINTR
info: Run time: 0h01m58s