My UE4 demo application crashes after launch

My demo UnrealEngine4 ios application crashes immediately after launch. At the same time, android build works fine. Here is the crash log:

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000000VM Region Info: 0 is not in any region.  Bytes before following region: 4366614528  REGION TYPE                      START - END             [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL  UNUSED SPACE AT START--->    __TEXT                 0000000104454000-000000010a1f0000 [ 93.6M] r-x/r-x SM=COW  ...podealUE4DemoTermination Signal: Segmentation fault: 11Termination Reason: Namespace SIGNAL, Code 0xbTerminating Process: exc handler [5038]Triggered by Thread:  0Thread 0 name:  Dispatch queue: com.apple.main-threadThread 0 Crashed:0   UE4Demo                 0x0000000106081624 FOutputDevice::LogfImpl+ 29546020 (char16_t const*, ...) + 2041   UE4Demo                 0x00000001060815b8 FOutputDevice::LogfImpl+ 29545912 (char16_t const*, ...) + 962   UE4Demo                 0x0000000105feff88 FDebug::AssertFailed+ 28950408 (char const*, char const*, int, char16_t const*, ...) + 3123   UE4Demo                 0x0000000105ed5eec FGenericPlatformTime::GetSecondsPerCycle64+ 27795180 () + 2444   UE4Demo                 0x0000000105f17c4c FThreadHeartBeat::Get+ 28064844 () + 4645   UE4Demo                 0x0000000106009bfc FDebug::EnsureFailed+ 29055996 (char const*, char const*, int, char16_t const*, int) + 3846   UE4Demo                 0x000000010600a288 FDebug::OptionallyLogFormattedEnsureMessageReturningFalseImpl+ 29057672 (bool, char const*, char const*, int, char16_t const*, ...) + 1167   UE4Demo                 0x0000000105ef1780 LLMMap<PointerKey, unsigned int, ELLMTag>::Remove+ 27907968 (PointerKey const&) + 4648   UE4Demo                 0x0000000105eefae0 FLLMTracker::TrackFree+ 27900640 (void const*, ELLMTracker, ELLMAllocType) + 1129   UE4Demo                 0x0000000105f1c49c FMemory::Free+ 28083356 (void*) + 20010  CFNetwork                       0x00000001bb945ce0 XTubeManager::~XTubeManager+ 204000 () + 5611  CFNetwork                       0x00000001bb945c28 XTubeManager::~XTubeManager+ 203816 () + 1212  CFNetwork                       0x00000001bb920300 -[__NSURLSessionLocal dealloc] + 4813  libobjc.A.dylib                 0x00000001ba565b9c (anonymous namespace)::AutoreleasePoolPage::pop+ 129948 (void*) + 67214  libobjc.A.dylib                 0x00000001ba54e220 call_load_methods + 73215  libobjc.A.dylib                 0x00000001ba54fe54 load_images + 18016  dyld                            0x000000010e54e390 dyld::notifySingle+ 9104 (dyld_image_states, ImageLoader const*, ImageLoader::InitializerTimingList*) + 44417  dyld                            0x000000010e560314 ImageLoader::recursiveInitialization+ 82708 (ImageLoader::LinkContext const&, unsigned int, char const*, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) + 44018  dyld                            0x000000010e55f370 ImageLoader::processInitializers+ 78704 (ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) + 13619  dyld                            0x000000010e55f42c ImageLoader::runInitializers+ 78892 (ImageLoader::LinkContext const&, ImageLoader::InitializerTimingList&) + 8420  dyld                            0x000000010e54e6d8 dyld::initializeMainExecutable+ 9944 () + 22021  dyld                            0x000000010e5532a0 dyld::_main+ 29344 (macho_header const*, unsigned long, int, char const**, char const**, char const**, unsigned long*) + 430422  dyld                            0x000000010e54d044 _dyld_start + 68

The only thing I'm doing on launch is showing a menu widget (which works fine in editor and android).

As I understand from the log, the main problem is outside of my code. It seems like FMemory::Free and other things are just service processes after crash. And I'm pretty sure that there is no my code in the call stack.