If you're having trouble connecting to the Call of Duty: Black Ops Cold War, you should first check Call of Duty: Black Ops Cold War Server Status. If the status indicator for your platform is not green or an alert is present, you might encounter connectivity issues until service is restored and fully operational.

The main cause is related to network issues. Other factors like insufficient access rights, antivirus interference, and offline game server status are responsible for Call of Duty Cold War not working.