the error msg : "XXXX"需要更新 此App的开发者需要更新App以在此iOS版本上正常工作
I can not open my inhouse on iOS 15 but it works on iOS 14
"XXXX" needs to be updated The developer of this app needs to update the app to work properly on this iOS version
“XXXX”应用尚不兼容 iOS 15。 您需要加载更新或要求开发人员提供更新 如果这是您内部开发的应用程序，只需使用更新版本的 xcode 重新编译，最终是 XCode 13 beta
"XXXX" app is not yet compatible with iOS 15. You need to load an update or ask the developer to provide one. If this is an app you developed inhouse, just recompile with a more recent version of xcode, eventually XCode 13 beta
Resign your app.