As soon as it launched on Game Pass, Call of Duty: WW2 was beset by hacking problems, most notably those concerning RCE exploits that allowed hackers to take control of others' PCs. The game has since been taken offline, with Activision not acknowledging the "issue" at hand.
Activision, by way of the official Call of Duty Updates page on X, announced on July 5 that CoD: WW2 would be going offline as developers investigate "reports an issue." This particularly affects the Microsoft Store (Game Pass) version of the game, which appears to be the most affected.
