When send message iOS device to iOS device receiver device app crashing.

[HemalAsanka]

When send message to iOS device to iOS device crash on receiver device app. I was checked it on iPhone 5 devices and it has iOS 9.3.5 version. It says:
fatal error: Input is wrong: file /BLEMingleiOS-master/BLEMingleiOS/BLEMingle.swift, line 122

[gitgarage]

This prototype works between two devices, one being Android and another iOS. I realize its a very specific use case, I may update it again soon. I am curious how much faster it might go on new devices.