This is Happy Wars management team.
After August 27 (Thursday) UTC 3:00, there is an issue where players have not been able to play multiplayer mode on Xbox 360 version.
This matter is currently under investigation, and we are doing our best to find a cause and a solution as fast as possible.
We will make an announcement once there are updates on how we can resolve the inconvenience.
Thank you for your continuous support for Happy Wars.
Unable to Play Multiplayer Mode