This is the crash report I get:
MachineId:18783DBD1043AD509DA35181A1F737C3
EpicAccountId:986dc58a1b154f2e872c4b724d7cfce0
SEGV_MAPERR at 0x0
ATankController::Aim() Address = 0x1b8e111bb [/Users/Shared/UnrealEngine/4.13/Engine/Source/Runtime/Engine/Classes/GameFramework/Actor.h, line 2674] [in UE4Editor-BattleTank-1127.dylib]
APlayerController::TickActor(float, ELevelTick, FActorTickFunction&) Address = 0x10b148534 (filename not found) [in UE4Editor-Engine.dylib]
FActorTickFunction::ExecuteTick(float, ELevelTick, ENamedThreads::Type, TRefCountPtr const&) Address = 0x10a0142f5 (filename not found) [in UE4Editor-Engine.dylib]
FTickFunctionTask::DoTask(ENamedThreads::Type, TRefCountPtr const&) Address = 0x10b6e4b31 (filename not found) [in UE4Editor-Engine.dylib]
TGraphTask::ExecuteTask(TArray<FBaseGraphTask*, FDefaultAllocator>&, ENamedThreads::Type) Address = 0x10b6e4537 (filename not found) [in UE4Editor-Engine.dylib]
FNamedTaskThread::ProcessTasksNamedThread(int, bool) Address = 0x10734af91 (filename not found) [in UE4Editor-Core.dylib]
FNamedTaskThread::ProcessTasksUntilQuit(int) Address = 0x107346a35 (filename not found) [in UE4Editor-Core.dylib]
FTaskGraphImplementation::ProcessThreadUntilRequestReturn(ENamedThreads::Type) Address = 0x1073432d1 (filename not found) [in UE4Editor-Core.dylib]
FTaskGraphImplementation::WaitUntilTasksComplete(TArray<TRefCountPtr, TInlineAllocator<4u, FDefaultAllocator> > const&, ENamedThreads::Type) Address = 0x107343b37 (filename not found) [in UE4Editor-Core.dylib]
FTickTaskSequencer::ReleaseTickGroup(ETickingGroup, bool) Address = 0x10b6ddc43 (filename not found) [in UE4Editor-Engine.dylib]
FTickTaskManager::RunTickGroup(ETickingGroup, bool) Address = 0x10b6d5924 (filename not found) [in UE4Editor-Engine.dylib]
UWorld::RunTickGroup(ETickingGroup, bool) Address = 0x10abde057 (filename not found) [in UE4Editor-Engine.dylib]
UWorld::Tick(ELevelTick, float) Address = 0x10abe6854 (filename not found) [in UE4Editor-Engine.dylib]
FSCSEditorViewportClient::Tick(float) Address = 0x1150d4afb (filename not found) [in UE4Editor-Kismet.dylib]
UEditorEngine::Tick(float, bool) Address = 0x10fac4b9a (filename not found) [in UE4Editor-UnrealEd.dylib]
UUnrealEdEngine::Tick(float, bool) Address = 0x110785247 (filename not found) [in UE4Editor-UnrealEd.dylib]
FEngineLoop::Tick() Address = 0x10723aaf4 (filename not found) [in UE4Editor]
GuardedMain(wchar_t const*) Address = 0x107242c2f (filename not found) [in UE4Editor]
-[UE4AppDelegate runGameThread:] Address = 0x107255b4c (filename not found) [in UE4Editor]
-[FCocoaGameThread main] Address = 0x107473726 (filename not found) [in UE4Editor-Core.dylib]
Unknown() Address = 0x7fffd2673c6d (filename not found) [in Foundation]
_pthread_body Address = 0x7fffe63beaab (filename not found) [in libsystem_pthread.dylib]
_pthread_body Address = 0x7fffe63be9f7 (filename not found) [in libsystem_pthread.dylib]
thread_start Address = 0x7fffe63be1fd (filename not found) [in libsystem_pthread.dylib]