Vivox Voice Chat Crash on IOS

Crashed: VxReachability-CheckInterface
0 ??? 0x122450000 (Missing)
1 PhotonDemoParticle 0x74e2c0 VivoxSystem::Apartment::RunTimers() + 1122 (__tree:1122)
2 PhotonDemoParticle 0x74d4c8 VivoxSystem::Apartment::RunAsync() + 639 (set:639)
3 PhotonDemoParticle 0x74d68c VivoxSystem::Apartment::Run() + 82 (smartptr.h:82)
4 PhotonDemoParticle 0x7680c4 VivoxSystem::MessageRouter::ThreadStart(VivoxSystem::Object*) + 405 (messagerouter.cpp:405)
5 PhotonDemoParticle 0x7792e4 VivoxSystem::OnThreadStart(void*) + 48 (thread.cpp:48)
6 PhotonDemoParticle 0x781188 VivoxSystem::OnThreadStart(void*) + 132 (osx.cpp:132)
7 libsystem_pthread.dylib 0x16b8 _pthread_start + 148
8 libsystem_pthread.dylib 0xb88 thread_start + 8

I am facing the above crash. Can someone will please help on this?