dyld: Library not loaded: @rpath/libswiftCore.dylib

Question

I am trying to run a Swift app on my iPhone 4s. It works fine on the simulator, and my friend can successfully run it on his iPhone 4s. I have iOS 8 and the official release

Answer 1

Surprisingly enough, all i did was "Clean" my project (shift+cmd+K) and it worked. Did seem to be related to the certificate though.