problem in VideoChat Sample in iOS

Hi
I try to run VideoChat Sample on iPhone 4S, iPhone 5S and iPhone 6 but it has problems-
a) When I try to run this sample on iPhone 4S(iOS 9.2) app crashes.
b) When I try to run this sample on than it gives compile time error. I have set Library Search Path for libraries.
Kindly refer attached screenshots and reply as soon as possible.

Your library search paths are not configured correctly. See step 9 here:

https://backendless.com/mobile-developers/quick-start-guide-for-ios/