@panya32, are you by any chance getting this warning too:
Target 'Pods-Loyalty' of project 'Pods' was rejected as an implicit dependency for 'Pods_Loyalty.framework' because its architectures 'x86_64' didn't contain all required architectures 'i386 x86_64'
There's some problem running the Loyalty template on the simulator, but it should work just fine on the iPhone itself.
As for converting, the Loyalty iPhone app is on Swift 2.3, which is still supported in Xcode 8, so you don't need to convert to Swift 3 right away, just click "Later" when Xcode asks you about it. (We'll convert it ourselves in the future and send you the updated version.)