Build Texture Streaming crashes on Unreal Engine 4.19

I was doing development on my game, and everything was working well, and now when going to Build, I end up with a Crash Report.
I fixed all the load errors, and still having the same Crash Report.
I have posted the Crash Report numerous times.

I can duplicate the problem consistently with Build Texture Streaming.
Intermediate step Getting Materials to Rebuild starts and finishes, and then before a new step appears, the crash occurs, at about 76% on the progress bar.

How should I follow up on this?

Can anyone help me with this, please?

Suggestions are quite welcome!

Below is the Crash Report.

Also, might the (filename not found) messages be a part of the problem (even though they are on every line)?


LoginId:6faa45b33040f255a09e86aefb9f0cf6

EpicAccountId:ad2de0ea28524f3bb44593793f38577c


 SEGV_MAPERR at 0x18


FMetalRHICommandContext::RHISetShaderUniformBuffer(FRHIPixelShader*, unsigned int, FRHIUniformBuffer*) Address = 0x1329c7f81 (filename not found) [in UE4Editor-MetalRHI.dylib]

void SetUniformBufferParameter<FRHIPixelShader*, FRHICommandList>(FRHICommandList&, FRHIPixelShader*, FShaderUniformBufferParameter const&, FRHIUniformBuffer*) Address = 0x11f99cf47 (filename not found) [in UE4Editor-Renderer.dylib]

void FForwardLightingParameters::Set<FRHICommandList, FRHIPixelShader*>(FRHICommandList&, FRHIPixelShader* const&, FViewInfo const&, bool) Address = 0x11fa2e309 (filename not found) [in UE4Editor-Renderer.dylib]

TBasePassPixelShaderPolicyParamType<FUniformLightMapPolicyShaderParametersType>::SetParameters(FRHICommandList&, FMaterialRenderProxy const*, FMaterial const&, FViewInfo const*, EBlendMode, ESceneRenderTargetsMode::Type, bool, bool) Address = 0x11fa3079e (filename not found) [in UE4Editor-Renderer.dylib]

TBasePassDrawingPolicy<FUniformLightMapPolicy>::SetSharedState(FRHICommandList&, FDrawingPolicyRenderState const&, FViewInfo const*, FMeshDrawingPolicy::ContextDataType, bool) const Address = 0x11fa2fffe (filename not found) [in UE4Editor-Renderer.dylib]

void FDrawTranslucentMeshAction::Process<FUniformLightMapPolicy>(FRHICommandList&, FProcessBasePassMeshParameters const&, FUniformLightMapPolicy const&, FUniformLightMapPolicy::ElementDataType const&) Address = 0x1203e297a (filename not found) [in UE4Editor-Renderer.dylib]

void ProcessBasePassMesh<FDrawTranslucentMeshAction>(FRHICommandList&, FProcessBasePassMeshParameters const&, FDrawTranslucentMeshAction&&) Address = 0x12039974c (filename not found) [in UE4Editor-Renderer.dylib]

FTranslucencyDrawingPolicyFactory::DrawMesh(FRHICommandList&, FViewInfo const&, FTranslucencyDrawingPolicyFactory::ContextType, FMeshBatch const&, unsigned long long const&, FDrawingPolicyRenderState const&, bool, FPrimitiveSceneProxy const*, FHitProxyId) Address = 0x12039884f (filename not found) [in UE4Editor-Renderer.dylib]

FTranslucencyDrawingPolicyFactory::DrawDynamicMesh(FRHICommandList&, FViewInfo const&, FTranslucencyDrawingPolicyFactory::ContextType, FMeshBatch const&, bool, FDrawingPolicyRenderState const&, FPrimitiveSceneProxy const*, FHitProxyId) Address = 0x120399855 (filename not found) [in UE4Editor-Renderer.dylib]

FRendererModule::DrawTileMesh(FRHICommandListImmediate&, FDrawingPolicyRenderState&, FSceneView const&, FMeshBatch const&, bool, FHitProxyId const&) Address = 0x12016d509 (filename not found) [in UE4Editor-Renderer.dylib]

FMeshMaterialRenderItem2::RenderMaterial(FRHICommandListImmediate&, FDrawingPolicyRenderState&, FSceneView const&, FMeshMaterialRenderItem2::FRenderData&) Address = 0x121363df6 (filename not found) [in UE4Editor-MaterialUtilities.dylib]

FMeshMaterialRenderItem2::Render_GameThread(FCanvas const*)::'lambda'(FRHICommandListImmediate&)::operator()(FRHICommandListImmediate&) const Address = 0x12136c35c (filename not found) [in UE4Editor-MaterialUtilities.dylib]

FMeshMaterialRenderItem2::Render_GameThread(FCanvas const*) Address = 0x121362b50 (filename not found) [in UE4Editor-MaterialUtilities.dylib]

FCanvas::Flush_GameThread(bool) Address = 0x112d14268 (filename not found) [in UE4Editor-Engine.dylib]

FMeshRenderer::RenderMaterialTexCoordScales(FMaterialMergeData&, FMaterialRenderProxy*, UTextureRenderTarget2D*, TArray<FFloat16Color, FDefaultAllocator>&) Address = 0x121355e0e (filename not found) [in UE4Editor-MaterialUtilities.dylib]

FMaterialUtilities::ExportMaterialUVDensities(UMaterialInterface*, EMaterialQualityLevel::Type, ERHIFeatureLevel::Type, FMaterialUtilities::FExportErrorManager&) Address = 0x121353567 (filename not found) [in UE4Editor-MaterialUtilities.dylib]

FEditorBuildUtils::EditorBuildTextureStreaming(UWorld*, EViewModeIndex) Address = 0x1177b2415 (filename not found) [in UE4Editor-UnrealEd.dylib]

FBuildAllHandler::ProcessBuild(TWeakPtr<SBuildProgressWidget, (ESPMode)0> const&) Address = 0x1177b1219 (filename not found) [in UE4Editor-UnrealEd.dylib]

FBuildAllHandler::StartBuild(UWorld*, FName, TWeakPtr<SBuildProgressWidget, (ESPMode)0> const&) Address = 0x1177aeeba (filename not found) [in UE4Editor-UnrealEd.dylib]

FEditorBuildUtils::EditorBuild(UWorld*, FName, bool) Address = 0x1177a95a1 (filename not found) [in UE4Editor-UnrealEd.dylib]

TBaseStaticDelegateInstance<void ()>::ExecuteIfSafe() const Address = 0x12a1796b7 (filename not found) [in UE4Editor-LevelEditor.dylib]

FUICommandList::ExecuteAction(TSharedRef<FUICommandInfo const, (ESPMode)0>) const Address = 0x116090cd2 (filename not found) [in UE4Editor-Slate.dylib]

SToolBarButtonBlock::OnClicked() Address = 0x1161c481f (filename not found) [in UE4Editor-Slate.dylib]

TBaseSPMethodDelegateInstance<false, SToolBarButtonBlock, (ESPMode)0, FReply ()>::Execute() const Address = 0x11623f056 (filename not found) [in UE4Editor-Slate.dylib]

SButton::OnMouseButtonUp(FGeometry const&, FPointerEvent const&) Address = 0x116295c41 (filename not found) [in UE4Editor-Slate.dylib]

FSlateApplication::RoutePointerUpEvent(FWidgetPath&, FPointerEvent&) Address = 0x11605d72b (filename not found) [in UE4Editor-Slate.dylib]

FSlateApplication::ProcessMouseButtonUpEvent(FPointerEvent&) Address = 0x115fff477 (filename not found) [in UE4Editor-Slate.dylib]

FSlateApplication::OnMouseUp(EMouseButtons::Type, FVector2D) Address = 0x11606683e (filename not found) [in UE4Editor-Slate.dylib]

FMacApplication::ProcessMouseUpEvent(FDeferredMacEvent const&, TSharedPtr<FMacWindow, (ESPMode)0>) Address = 0x115f5cecf (filename not found) [in UE4Editor-ApplicationCore.dylib]

FMacApplication::ProcessEvent(FDeferredMacEvent const&) Address = 0x115f51ed8 (filename not found) [in UE4Editor-ApplicationCore.dylib]

FMacApplication::ProcessDeferredEvents(float) Address = 0x115f51a0f (filename not found) [in UE4Editor-ApplicationCore.dylib]

FSlateApplication::TickPlatform(float) Address = 0x11602b129 (filename not found) [in UE4Editor-Slate.dylib]

FSlateApplication::Tick(ESlateTickType) Address = 0x11602a6d3 (filename not found) [in UE4Editor-Slate.dylib]

FEngineLoop::Tick() Address = 0x10fcf05de (filename not found) [in UE4Editor]

GuardedMain(wchar_t const*) Address = 0x10fcf9252 (filename not found) [in UE4Editor]

-[UE4AppDelegate runGameThread:] Address = 0x10fd07240 (filename not found) [in UE4Editor]

-[FCocoaGameThread main] Address = 0x10ffb1057 (filename not found) [in UE4Editor-Core.dylib]

Unknown() Address = 0x7fff31748e48 (filename not found) [in Foundation]

_pthread_body Address = 0x7fff5714c6c1 (filename not found) [in libsystem_pthread.dylib]

_pthread_body Address = 0x7fff5714c56d (filename not found) [in libsystem_pthread.dylib]

thread_start Address = 0x7fff5714bc5d (filename not found) [in libsystem_pthread.dylib]