When I create a new project using the \"Messages Application\" template of Xcode 8 and try to run it on iOS simulator, I get the following error:
This happened to me when I was using a beta of xcode 8.1. When I upgraded the app store version of xcode from 8.0 to 8.1 this problem disappeared (and it never happened with 8.0, just the 8.1 beta). Couldn't find a reference to a bug or a fix, but if you're not using the official app store version of xcode it might be worth double checking.