Unreal Engine 4.18 Preview

[=“Stephen_Ellis, post:143, topic:100191”]

UPDATE!

We have just released Preview 4 for 4.18! Thank you for your continued help in testing the 4.18 build before its official release. As a reminder, the Preview builds are for testing only, and should not be used for the active development of your project.

For a list of known issues affecting this latest preview, please follow the links provided on the first post in this thread.

Cheers!

Fixed in Preview 4

Fixed! UE-50690 Section highlighting no longer functions on skeletal meshes
Fixed! UE-50664 Content Examples - PhysicalAnimation - Example 1.5 Doesn’t stop moving when physical animation slider is zero
Fixed! UE-50832 [CrashReport] UE4Editor_Engine!FSoundConcurrencyManager::RemoveActiveSound() [soundconcurrency.cpp:545]
Fixed! UE-50793 QAGame crashes on android when streaming audio
Fixed! UE-50750 Mac: Audio Loops Stutter Noticeably with New Audio Engine Enabled
Fixed! UE-50734 Sound wave thumbnails don’t redraw after reimport
Fixed! UE-50720 Unplugging audio device while audio is playing causes Games to crash
Fixed! UE-50717 Connecting a child submix that is the same as parent submix stack overflows
Fixed! UE-50581 Crash creating Sound Source Bus after adding Child Submix to Submix Asset
Fixed! UE-50737 [CrashReport] PhysX3PROFILE_x64!physx::Sc::BodySim::activateInteractions() [scbodysim.cpp:496]
Fixed! UE-50736 [CrashReport] UE4Editor_DetailCustomizations!FBodyInstanceCustomization::MarkAllBodiesDefaultCollision() [bodyinstancecustomization.cpp:829]
Fixed! UE-50656 [CrashReport] Access Violation - UModelComponent::GetPhysicsTriMeshData() [modelcomponent.cpp:673]
Fixed! UE-50755 PlatformResultToGenericResult fails to identify Not Found
Fixed! UE-50691 Cannot select Online Linked account in ShooterGame for Switch with Development package
Fixed! UE-50898 Crash during compilation while adding a new C++ class to a project a Code project
Fixed! UE-50853 Loading large packages in a 32-bit build can fail
Fixed! UE-50788 Crash when printing %c on Linux, HTML5, Mac
Fixed! UE-50713 Hot Reload after modifying the constructor in the source file caused instances of class in UE4Editor to lose user code changes in the details panel
Fixed! UE-50617 VSCode: Clean build tasks build SCW prior to the cleaning if SCW executable is not present
Fixed! UE-50616 Crash adding a C++ First Person feature pack to a project
Fixed! UE-50532 Packaging a plugin fails due to VisualStudioCodeSourceCodeAccessor.cpp not including VisualStudioCodeSourceCodeAccessModule.h as the first include
Fixed! UE-50875 #include found after .generated.h file when building UE4Editor
Fixed! UE-50675 Exception when building incrementally from installed build
Fixed! UE-50559 Hot reload can prevent code components from being accessible in blueprints
Fixed! UE-50440 GitHub 4058 : UBT: Fix linking unchanged modules with VS 15.3
Fixed! UE-50859 Crash reporter client failing to compile - ‘ClassToHotReload’: undeclared identifier
Fixed! UE-49656 Match3 renders as a solid color at -on
Fixed! UE-47732 Docs - Tutorials - page not found for sprite doc in 2D Side Scroller Blueprint tutorial
Fixed! UE-50828 Crash removing more indexes from an Instanced Static Mesh loop than the number that exist
Fixed! UE-50738 Many automated tests giving warning “DestroyActor: World has no context!”
Fixed! UE-49774 [CrashReport] UE4Editor_Engine!UWorld::SetActiveLevelCollection() [world.cpp:6248]
Fixed! UE-48692 [CrashReport] UE4Editor_UnrealEd!TArray<TScriptDelegate<FWeakObjectPtr>,FDefaultAllocator>::Find() [array.h:784]
Fixed! UE-50768 Crash closing Parent and Child blueprint after renaming variable
Fixed! UE-50764 Actor Class Reference can take invalid Value, can lead to crash
Fixed! UE-50751 Precomputed visibility for blueprint added components is lost on level reload
Fixed! UE-50703 Crash changing variable type from Object Reference to Actor Soft Object Reference
Fixed! UE-50679 Cook by the Book fails with Nativization enabled
Fixed! UE-50696 Crash occurs when diffing blueprint that has had one of its variables changed to a Soft Object Reference
Fixed! UE-50829 Engine failing to compile - MetalShaderCompiler.cpp
Fixed! UE-50826 Unable to find OBB or store key when packaging for android distribution from Mac
Fixed! UE-50790 iPhone8 and 8+ don’t have device profile cvar settings
Fixed! UE-50731 SunTemple specularity renders too glossy on various Android devices
Fixed! UE-50715 Need to limit use of density in manifest to SDK API 24+ and MinSDK 17+
Fixed! UE-50707 Metal Mobile Renderer remains checked after disabling it in the Project Settings
Fixed! UE-50669 ShooterGame crashes on Nvidia Shield with undefined variable error
Fixed! UE-50668 Rear camera is oriented upside down on Nexus 5X
Fixed! UE-50599 HTML5 Fails to to Firefox: “‘str’ object has no attribute ‘write’”
Fixed! UE-50049 iOS Remote shader compile can’t work because settings aren’t inherited
Fixed! UE-47890 MP4 playback doesn’t resume (from suspend) on iOS11
Fixed! UE-50781 Lightmass crashes when lighting is built with material that has “Cast Shadow as Masked”
Fixed! UE-50658 [CrashReport] Mac Assertion failed: TaskDataArray.Num() == Exporter->VolumetricLightmapTaskGuids.Num()
Fixed! UE-50657 [CrashReport] UE4Editor_Renderer!FSceneRenderer::CreateWholeSceneProjectedShadow() [shadowsetup.cpp:1978]
Fixed! UE-50655 [CrashReport] UE4Editor_Renderer!FProjectedShadowInfo::AddSubjectPrimitive() [shadowsetup.cpp:793]
Fixed! UE-48274 [CrashReport] UE4Editor_Core!FModuleManager::LoadModuleChecked() [modulemanager.cpp:350]
Fixed! UE-44033 GPUSkin cache doesn’t recompute tangents if not using mesh 0
Fixed! UE-50785 Sequencer bindings are broken when scrubbing in Simulate mode
Fixed! UE-50608 Transform track can’t be edited for Spawnable empty actor in Sequencer
Fixed! UE-50501 Error on Attempting to Save Map Containing Actor Sequence Component
Fixed! UE-48923 Animation tracks on a Level Sequence do not play when the skeletal mesh is spawned
Fixed! UE-45752 Actor Sequence Component Not Working While Playing in Standalone
Fixed! UE-50795 Media sample queue API allows usage patterns that can lead to deadlocks or crashes
Fixed! UE-49878 MediaExample_MP4 Continues Playing Loaded Audio After Swiping Off Screen
Fixed! UE-50771 Mac - Toasts hide behind the editor when dismissing the right-click menu in the Content Browser
Fixed! UE-50662 Linux: Crash when Selecting Volume Geometry in Geometry Edit Mode
Fixed! UE-50602 Mac - Content Browser menus are dismissed when using them while toasts are running
Fixed! UE-49835 Linux: Crash handler is crashing
Fixed! UE-49576 Editor grabs focus from behind other application windows
Fixed! UE-4977 Modal Windows don’t block MainFrame menu input
Fixed! UE-50735 GitHub 4076 : Fixed “Project Settings” Crash on Linux Editor
Fixed! UE-50815 Crash occurs in QAGame when selecting Play - QAHUD:: DrawWithBackground()

REMEMBER: Please report any new bugs you find to the UE4 Answerhub in the ‘Bugs Reports’ section.
(How to Report a Bug)
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I have installed clang from the website. Also including path in environment variable “Please install clang or check configuration clang.executable

but still get this error. How to fix?