KKS laucher can't switch language to Japanese

[hakuorai]

Error message pops up after clicking Japansese button: "System.NullReferenceException: Object reference not set to an instance of an object at InitSetting.EnvironmentHelper.SetLanguage (System.String language)", same as this issue mentioned, then the laucher crashes and game language doesn't change. Switching to other languages is no problem.

Rolling back to 3.2.0.20676 fixes that (didn't try other versions).

My environment is Windows 10 in Chinese.