This is the "golden solution" for the Steam version. For some reason, Black Ops 2 has trouble locating its own install path on modern drives.
Ensure the sound bank file actually exists in the correct path. It should typically be in: Call of Duty Black Ops II / zone / all / cmn_root.english black ops 2 sound bank failed to load cmnrootenglish best
If your game is trying to load English sound banks but is set to another language regionally, it will crash. This is the "golden solution" for the Steam version
If you are seeing this error message in Call of Duty: Black Ops 2 , you are not alone. For nearly a decade, this frustrating pop-up has stopped PC players mid-game, crashed lobbies, and prevented campaign progress. The error is notoriously vague, but the cause is surprisingly simple. It should typically be in: Call of Duty
