On 12.1.2017, from 14:00 - 15:00 CET (05:00 - 06:00 am PST), we will apply a Windows update.
During this update, you will not be able to use the launcher. This means you can continue playing if you’re already logged into the game, but if you’re not logged in, you will be unable to log in during the time the update takes place.
We apologize for any inconvenience this may cause.
Combat Arms Team