This is Happy Wars management team.
Happy Wars for Xbox 360 has been experiencing network issues since 8 pm on April 22nd (UTC) due to the Network Save Service.
We are currently working toward fixing this issue as quickly as we can.
The Windows 10 and Xbox One versions of Happy Wars are unaffected and can be played normally.
We apologize for any inconvenience this may cause. Thank you as always for playing Happy Wars.
Network Issues on Xbox 360