This is Happy Wars management team.
There was an issue where some players were unable to play Happy Wars for Xbox 360 due to Network Save Service during September 5th 9 p.m. (UTC) / 2 p.m. (PST) to September 6th 10 p.m. (UTC) / 3 p.m. (PST), but it is now fixed.
Thank you for your continuous support for Happy Wars.
About Network Trouble on Xbox 360 version