Game won't start - “Steam must be running an logged in to play title online.”

Hi,

I’ve been playing Gen. Zero om my PC for some time now, so far without any problems. Now after installing the december update Gen. Zero won’t start any more, there is an error message stating: “Steam must be running an logged in to play title online.”
Steam is running and I’m logged in though, other games run fine, and I’m able to play other titles online in multiplayer…

Can somebody please help to get Gen. Zero working again?

best,

Nils

Corrected topic title + please follow the READ BEFORE POSTING - How to Make a Bug Report guide to give us more information.

//Mod