We had a problem where some of the iOS9/iOS10 users were forced quit from the app.
Affected Date: From 2018/01/01 (Mon)
While using ChatWork's iOS application with iOS 9 / iOS 10, some customers have experienced a problem where the app was crashing when user tried to load messages sent in 2018.
The problem has been solved with the latest version of our app.
Please update to the latest version (v4.21.1) from the following link.