Check(0): Unhandled socket error! Error Code: 8

After 4.19 install, trying to run my project.
During shared compilation stage I see a crash in check(0).

UE_4.19\Engine\Source\Runtime\Sockets\Private\Windows\SocketSubsystemWindows.cpp:267

Log message:

[2018.03.15-13.59.06:240][  0]LogTcpMessaging: Initializing TcpMessaging bridge
[2018.03.15-13.59.06:301][  0]LogUdpMessaging: Initializing bridge on interface 0.0.0.0:0 to multicast group 230.0.0.1:6666.
[2018.03.15-13.59.06:303][  0]FUdpSocketBuilder: Failed to subscribe UdpMessageMulticastSocket to multicast group 230.0.0.1
[2018.03.15-14.01.30:133][  0]LogSockets: Warning: Unhandled socket error! Error Code: 8

Specs: win10 1709, vs2017 (15.6.2), 36 logical cores, 128 GB RAM.

Stack trace:

>	UE4Editor-Sockets.dll!FSocketSubsystemWindows::TranslateErrorCode(int Code=8) Line 266	C++
 	UE4Editor-UdpMessaging.dll!FUdpSocketBuilder::Build() Line 321	C++
 	[Inline Frame] UE4Editor-UdpMessaging.dll!FUdpSocketBuilder::operator class FSocket *() Line 229	C++
 	UE4Editor-UdpMessaging.dll!FUdpMessageTransport::StartTransport(IMessageTransportHandler & Handler={...}) Line 77	C++
 	UE4Editor-Messaging.dll!FMessageBridge::Enable() Line 81	C++
 	UE4Editor-UdpMessaging.dll!FMessageBridgeBuilder::Build() Line 109	C++
 	UE4Editor-UdpMessaging.dll!FMessageBridgeBuilder::operator TSharedPtr<IMessageBridge,1>() Line 124	C++
 	UE4Editor-UdpMessaging.dll!FUdpMessagingModule::InitializeBridge() Line 337	C++
 	UE4Editor-UdpMessaging.dll!FUdpMessagingModule::RestartServices() Line 412	C++
 	UE4Editor-UdpMessaging.dll!FUdpMessagingModule::StartupModule() Line 257	C++
 	UE4Editor-Core.dll!FModuleManager::LoadModuleWithFailureReason(const FName InModuleName={...}, EModuleLoadResult & OutFailureReason=Success) Line 505	C++
 	UE4Editor-Projects.dll!FModuleDescriptor::LoadModulesForPhase(ELoadingPhase::Type LoadingPhase=PreDefault, const TArray<FModuleDescriptor,FDefaultAllocator> & Modules={...}, TMap<FName,enum EModuleLoadResult,FDefaultSetAllocator,TDefaultMapHashableKeyFuncs<FName,enum EModuleLoadResult,0> > & ModuleLoadErrors={...}) Line 484	C++
 	UE4Editor-Projects.dll!TryLoadModulesForPlugin(const FPlugin & Plugin={...}, const ELoadingPhase::Type LoadingPhase=PreDefault) Line 910	C++
 	UE4Editor-Projects.dll!FPluginManager::LoadModulesForEnabledPlugins(const ELoadingPhase::Type LoadingPhase=PreDefault) Line 975	C++
 	UE4Editor.exe!FEngineLoop::LoadStartupModules() Line 2603	C++
 	UE4Editor.exe!FEngineLoop::PreInit(const wchar_t * CmdLine=0x00000186097ad840) Line 2027	C++
 	[Inline Frame] UE4Editor.exe!EnginePreInit(const wchar_t *) Line 42	C++
 	UE4Editor.exe!GuardedMain(const wchar_t * CmdLine=0x0000018606b83228, HINSTANCE__ * hInInstance=0x0000018606b831b6, HINSTANCE__ * hPrevInstance=0x000000000000000a, int nCmdShow=-742064128) Line 127	C++
 	UE4Editor.exe!WinMain(HINSTANCE__ * hInInstance=0x00007ff6d3c50000, HINSTANCE__ * hPrevInstance=0x0000000000000000, char * __formal=0x0000000000000000, int nCmdShow=10) Line 199	C++
 	[Inline Frame] UE4Editor.exe!invoke_main() Line 94	C++
 	UE4Editor.exe!__scrt_common_main_seh() Line 253	C++
 	kernel32.dll!BaseThreadInitThunk()	Unknown
 	ntdll.dll!RtlUserThreadStart()	Unknown