_BSMachError while running Stanford's CS193p Smashtag app

Question

I downloaded the Smasthag demo app from course\'s site. Project builds fine (after small changes in Twitter, TwitterRequest etc. classes, because I use the latest Xcode 7b4) and

Answer 1

I meet the same problem since I switch the keyboard form the system keyboard to self-defined keyboard.However it doesn`t affect my app running.