Editor crashes when pushing "play"

MachineId: EpicAccountId:

SEGV_MAPERR at 0x3

FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x10cc1e50b [/Users/build/Build/++UE4+Release-4.13+Compile/Sync/Engine/Source/Runtime/Core/Private/GenericPlatform/GenericPlatformMisc.cpp, line 307] [in UE4Editor-Core.dylib] FOutputDeviceMacError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x10cdf8d36 [/Users/build/Build/++UE4+Release-4.13+Compile/Sync/Engine/Source/Runtime/Core/Private/Mac/MacPlatformOutputDevices.cpp, line 93] [in UE4Editor-Core.dylib] FOutputDevice::Logf(wchar_t const*, …) Address = 0x10ce76727 [/Users/build/Build/++UE4+Release-4.13+Compile/Sync/Engine/Source/Runtime/Core/Private/Misc/OutputDevice.cpp, line 94] [in UE4Editor-Core.dylib] FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, …) Address = 0x10ce71e9b [Runtime/Core/Public/Containers/ContainerAllocationPolicies.h, line 484] [in UE4Editor-Core.dylib] AGameSession::RegisterPlayer(APlayerController*, TSharedPtr const&, bool) Address = 0x10f0db44f [/Users/build/Build/++UE4+Release-4.13+Compile/Sync/Engine/Source/Runtime/Engine/Private/GameSession.cpp, line 234] [in UE4Editor-Engine.dylib] AGameMode::InitNewPlayer(APlayerController*, FUniqueNetIdRepl const&, FString const&, FString const&) Address = 0x10f0c42df [/Users/build/Build/++UE4+Release-4.13+Compile/Sync/Engine/Source/Runtime/Core/Public/Containers/ContainerAllocationPolicies.h, line 484] [in UE4Editor-Engine.dylib] AGameMode::Login(UPlayer*, ENetRole, FString const&, FString const&, FUniqueNetIdRepl const&, FString&) Address = 0x10f0c4d66 [/Users/build/Build/++UE4+Release-4.13+Compile/Sync/Engine/Source/Runtime/Engine/Private/GameMode.cpp, line 1108] [in UE4Editor-Engine.dylib] UWorld::SpawnPlayActor(UPlayer*, ENetRole, FURL const&, FUniqueNetIdRepl const&, FString&, unsigned char)