Crash trying to import facial animations

Fatal error: [File:D:\Build\++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\Misc\PackageName.cpp] [Line: 381] LongPackageNameToFilename failed to convert '/FaceFX/QAFaceFXAudio/FacialAnimSource - Import/de/AndObilivionDialogue'. Path does not map to any roots.

UE4Editor_CoreUObject!FPackageName::LongPackageNameToFilename() packagename.cpp:381 
UE4Editor_Engine!UAssetImportData::SanitizeImportFilename() assetimportdata.cpp:171 
UE4Editor_Engine!UAssetImportData::Update() assetimportdata.cpp:117 
UE4Editor_AudioEditor!USoundFactory::FactoryCreateBinary() soundfactory.cpp:243 
UE4Editor_UnrealEd!UFactory::FactoryCreateBinary() factory.h:290 
UE4Editor_UnrealEd!UFactory::FactoryCreateFile() factory.cpp:87 
UE4Editor_UnrealEd!UFactory::ImportObject() factory.cpp:162 
UE4Editor_UnrealEd!UFactory::StaticImportObject() factory.cpp:409 
UE4Editor_UnrealEd!UFactory::StaticImportObject() factory.cpp:342 
UE4Editor_FacialAnimationEditor!FImportItem::ImportSoundWave() sfacialanimationbulkimporter.cpp:103 
UE4Editor_FacialAnimationEditor!FImportItem::ImportCurvesEmbeddedInSoundWave() sfacialanimationbulkimporter.cpp:129 
UE4Editor_FacialAnimationEditor!SFacialAnimationBulkImporter::HandleImportClicked() sfacialanimationbulkimporter.cpp:208 
UE4Editor_FacialAnimationEditor!TMemberFunctionCaller<SFacialAnimationBulkImporter,FReply() delegateinstanceinterface.h:165 
UE4Editor_FacialAnimationEditor!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SFacialAnimationBulkImporter,FReply() tuple.h:134 
UE4Editor_FacialAnimationEditor!TBaseSPMethodDelegateInstance<0,SFacialAnimationBulkImporter,0,FReply __cdecl() delegateinstancesimpl.h:327 
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() delegatesignatureimpl.inl:537 
UE4Editor_Slate!SButton::OnMouseButtonUp() sbutton.cpp:278 
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() slateapplication.cpp:5070 
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() slateapplication.cpp:238 
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() slateapplication.cpp:5059 
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() slateapplication.cpp:5524 
UE4Editor_Slate!FSlateApplication::OnMouseUp() slateapplication.cpp:5501 
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1698 
UE4Editor_Core!FWindowsApplication::DeferMessage() windowsapplication.cpp:2120 
UE4Editor_Core!FWindowsApplication::ProcessMessage() windowsapplication.cpp:867 
UE4Editor_Core!FWindowsApplication::AppWndProc() windowsapplication.cpp:714 
user32!<Unknown> 
user32!<Unknown> 
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() windowsplatformmisc.cpp:979 
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:2977 
UE4Editor!GuardedMain() launch.cpp:166 
UE4Editor!GuardedMainWrapper() launchwindows.cpp:134 
UE4Editor!WinMain() launchwindows.cpp:210 
UE4Editor!__scrt_common_main_seh() exe_common.inl:264 
kernel32!<Unknown> 
ntdll!<Unknown>