Hotfix 1.1.1 is now available for PC, applying an initial fix for the Disconnected (CGK) error that could appear when you use the 'Play Now' button to join a match. It may take a few hours before you see benefits.
The hotfix for consoles will follow later. Until this is live, you can still run into the Disconnected (CGK) error on all platforms in rare cases. If you do, try manually joining a match from the list with at least 2-5 open player slots.