Lambda capture "" is not used

I’ve been trying to package my Unreal 4.18 project for mac osx, but everytime it comes up with the following errors:

UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3285:37: error: lambda capture 'LocalMapLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3298:41: error: lambda capture 'LocalMapLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3808:47: error: lambda capture 'LocalSetLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3285:37: error: lambda capture 'LocalMapLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3298:41: error: lambda capture 'LocalMapLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3808:47: error: lambda capture 'LocalSetLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3285:37: error: lambda capture 'LocalMapLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3298:41: error: lambda capture 'LocalMapLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3808:47: error: lambda capture 'LocalSetLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3285:37: error: lambda capture 'LocalMapLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3298:41: error: lambda capture 'LocalMapLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   Runtime/CoreUObject/Public/UObject/UnrealType.h:3808:47: error: lambda capture 'LocalSetLayoutForCapture' is not used [-Werror,-Wunused-lambda-capture]
UATHelper: Packaging (Mac):   3 errors generated.
UATHelper: Packaging (Mac):   3 errors generated.
UATHelper: Packaging (Mac):   3 errors generated.
UATHelper: Packaging (Mac):   3 errors generated.
UATHelper: Packaging (Mac):   ERROR: UBT ERROR: Failed to produce item: /Volumes/Hard Drive 1 1/1TB/CMT/CMT 3/Devised Project/PlatformerGame/NEW/PlatformerGameNew/Plugins/FootIK/Binaries/Mac/UE4-FootIKRuntime.a
UATHelper: Packaging (Mac): ERROR: Command failed (Result:5): /Users/Shared/Epic Games/UE_4.18/Engine/Binaries/DotNET/UnrealBuildTool.exe PlatformerGame Mac Development -Project="/Volumes/Hard Drive 1 1/1TB/CMT/CMT 3/Devised Project/PlatformerGame/NEW/PlatformerGameNew/PlatformerGameNew.uproject"  "/Volumes/Hard Drive 1 1/1TB/CMT/CMT 3/Devised Project/Platfo
UATHelper: Packaging (Mac): RunUAT ERROR: AutomationTool was unable to run successfully.
PackagingResults: Error: Unknown Error

If someone could explain what this means and how I go about fixing it that would be great. As a sound designer working on portfolio content, I’m not massively experienced with Unreal or X-Xode, so depending how complex responses are I may be asking for more help!

I’ve also looked on other forum posts about similar issues, but couldn’t understand them enough to fix my issues…

Thanks in advance for any help!