This is Happy Wars management team.
After the update on August 20 (Thursday) UTC 9:00, there are two issues occurring to some players: players cannot claim the Co-op rewards, and one of four weekly missions has disappeared.
These matters are 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.
About Unable to claim the Co-op rewards and One Weekly Mission disappeared