After successfully compiling the project in Xcode 6, I am unable to run it in the simulator with the above mentioned message. I did all the possible research, tried everythi
If you change the name of the supplied class InterfaceController set by default when you start a new project. This class is referenced in the Info.plist under the key RemoteInterfacePrincipalClass. In my case, I got the error mentioned by the OP until I fixed the name of the class in there (see screenshot).
