Trying to install an app in simulator. iOS 11 XCode 9.0 Beta 2:
An error was encountered processing the command (domain=IXUserPresentableErrorDomain, code=2):
This app was unable to be installed.
Trying to install an app in simulator. iOS 11 XCode 9.0 Beta 2:
An error was encountered processing the command (domain=IXUserPresentableErrorDomain, code=2):
This app was unable to be installed.
All that says is that the error was that the user presentable error(s) could not be processed - an error occured trying to show the real error. It doesn't say what the error was that couldn't be presented.
If it's repeatable, might be time to file a bug.
Otherwise, without any info an what that app does, there isn't much else to say, except maybe to check the beta release notes as pertains to it.