Hey, JohnnyBgood! This is a common error on the forums, but it is not one of our errors. This error happens within the Call of Duty game and caused by connection issues to the CoD servers. It is outside of Blizzard’s technical support. Technical support can only assist with installation and patching issues for our partnered games. Here’s our post going through our support for CoD in more detail.
If you’d like to bug report this to have our application team look into the issue, I suggest posting this on the #bug-report forums instead.