Crash Building Lighting 4.23.1 Mac

My map keeps crashing whenever i try building lighting… The build process goes fine up till it begins the import lighting process. Invalid path somewhere??

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Assertion failed: TaskDataArray.Num() == Exporter->VolumetricLightmapTaskGuids.Num() [File:/Users/build/Build/++UE4/Sync/Engine/Source/Editor/UnrealEd/Private/Lightmass/ImportVolumetricLightmap.cpp] [Line: 956] Import Volumetric Lightmap failed: Expected 0 tasks, only found 789292588

FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x109756d1b (filename not found) [in UE4Editor-Core.dylib]
FMacErrorOutputDevice::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x1098b09a0 (filename not found) [in UE4Editor-Core.dylib]
FOutputDevice::LogfImpl(wchar_t const*, …) Address = 0x10999a829 (filename not found) [in UE4Editor-Core.dylib]
AssertFailedImplV(char const*, char const*, int, wchar_t const*, __va_list_tag*) Address = 0x10992a0fd (filename not found) [in UE4Editor-Core.dylib]
FDebug::CheckVerifyFailedImpl(char const*, char const*, int, wchar_t const*, …) Address = 0x109929f82 (filename not found) [in UE4Editor-Core.dylib]
FLightmassProcessor::ImportVolumetricLightmap() Address = 0x113fccf96 (filename not found) [in UE4Editor-UnrealEd.dylib]
FLightmassProcessor::CompleteRun() Address = 0x113fe74f8 (filename not found) [in UE4Editor-UnrealEd.dylib]
FStaticLightingSystem::FinishLightmassProcess() Address = 0x114315f69 (filename not found) [in UE4Editor-UnrealEd.dylib]
FStaticLightingManager::ProcessLightingData() Address = 0x114315b30 (filename not found) [in UE4Editor-UnrealEd.dylib]
FStaticLightingSystem::UpdateLightingBuild() Address = 0x11431cbf6 (filename not found) [in UE4Editor-UnrealEd.dylib]
FStaticLightingManager::UpdateBuildLighting() Address = 0x11431c1d6 (filename not found) [in UE4Editor-UnrealEd.dylib]
UEditorEngine::UpdateBuildLighting() Address = 0x11432b47b (filename not found) [in UE4Editor-UnrealEd.dylib]
FEngineLoop::Tick() Address = 0x109615946 (filename not found) [in UE4Editor]
GuardedMain(wchar_t const*) Address = 0x10962033e (filename not found) [in UE4Editor]
-[UE4AppDelegate runGameThread:] Address = 0x10962a83f (filename not found) [in UE4Editor]
-[FCocoaGameThread main] Address = 0x1098afa51 (filename not found) [in UE4Editor-Core.dylib]
Unknown() Address = 0x7fff366c1932 (filename not found) [in Foundation]
_pthread_start Address = 0x7fff6b70dd36 (filename not found) [in libsystem_pthread.dylib]
thread_start Address = 0x7fff6b70a58f (filename not found) [in libsystem_pthread.dylib]

Hello,

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Thanks