When Steam launches a game, it tells Windows, "Hey, I am running App 202970." The error "Appid Is Not Configured" usually means one of two things:
This is the most common direct fix. Sometimes a text file containing the AppID is created in the game folder when it shouldn't be, confusing the launcher. Right-click on Black Ops 2 Steam Library Browse local files Look for a file named steam_appid.txt this file and try launching the game again. 2. Clear Steam’s App Cache Appid Is Not Configured Call Of Duty Black Ops 2
It is crucial that Steam is not running in the background. When Steam launches a game, it tells Windows,