a problem with the game
I have this problem when starting up black ops 2 whether it's zombie or multiplayer it either says this or it says snowroller uninitialized it's been bothering me for days
Snowroller uninitialized iirc is caused due to you having an old build of plutonium instead of being on the latest one. If you're running plutonium.exe and still getting that error, delete %localappdata%/Plutonium and try running the launcher again.
As for the "unknown error" - change DNS servers to 22.214.171.124 or use a VPN.