Potential workaround for this issue as suggested by a licensee: Window -> Load Layout -> Default Editor Layout
We have been unable to get an internal repro so far, however we have had quite a few reports from the community reporting this issue.
One user also stated this happens when migrating a project over from 4.25, however we were still unable to reproduce that.
Error Message:
Assertion failed: IsValid() [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Templates/SharedPointer.h] [Line: 824]
ntdll!7ff893670000 + 9c034 KERNELBASE!7ff8910e0000 + 1a34e UE4Editor-Core!ReportCrash(_EXCEPTION_POINTERS *) [WindowsPlatformCrashContext.cpp:1574] UE4Editor!7ff6d49d0000 + 3b0ff VCRUNTIME140!7ff876f90000 + e360 ntdll!7ff893670000 + a130f ntdll!7ff893670000 + 4b5e4 ntdll!7ff893670000 + 4b335 KERNELBASE!7ff8910e0000 + 2d759 UE4Editor-Core!ReportAssert(wchar_t const *,int) [WindowsPlatformCrashContext.cpp:1627] UE4Editor-Core!FWindowsErrorOutputDevice::Serialize(wchar_t const *,ELogVerbosity::Type,FName const &) [WindowsErrorOutputDevice.cpp:78] UE4Editor-Core!FOutputDevice::LogfImpl(wchar_t const *,...) [OutputDevice.cpp:61] UE4Editor-Core!static void AssertFailedImplV(const char *, const char *, int, const wchar_t *, char *) [AssertionMacros.cpp:102] UE4Editor-Core!FDebug::CheckVerifyFailedImpl(char const *,char const *,int,wchar_t const *,...) [AssertionMacros.cpp:458] UE4Editor-StaticMeshEditor!FStaticMeshEditor::SpawnTab_PreviewSceneSettings(FSpawnTabArgs const &) [StaticMeshEditor.cpp:537] UE4Editor-StaticMeshEditor!class TSharedRef<SDockTab,0> TBaseSPMethodDelegateInstance<0,FStaticMeshEditor,0,TSharedRef<SDockTab,0> __cdecl(FSpawnTabArgs const &) [DelegateInstancesImpl.h:290] UE4Editor-Slate!FTabManager::SpawnTab(FTabId const &,TSharedPtr<SWindow,0> const &,bool) [TabManager.cpp:1708] UE4Editor-Slate!FTabManager::RestoreArea_Helper(TSharedRef<FTabManager::FLayoutNode,0> const &,TSharedPtr<SWindow,0> const &,bool,EOutputCanBeNullptr) [TabManager.cpp:1445] UE4Editor-Slate!FTabManager::RestoreSplitterContent(TSharedRef<FTabManager::FSplitter,0> const &,TSharedRef<SDockingSplitter,0> const &,TSharedPtr<SWindow,0> const &) [TabManager.cpp:1637] UE4Editor-Slate!FTabManager::RestoreArea_Helper(TSharedRef<FTabManager::FLayoutNode,0> const &,TSharedPtr<SWindow,0> const &,bool,EOutputCanBeNullptr) [TabManager.cpp:1576] UE4Editor-Slate!FTabManager::RestoreSplitterContent(TSharedRef<FTabManager::FSplitter,0> const &,TSharedRef<SDockingSplitter,0> const &,TSharedPtr<SWindow,0> const &) [TabManager.cpp:1637] UE4Editor-Slate!FTabManager::RestoreArea_Helper(TSharedRef<FTabManager::FLayoutNode,0> const &,TSharedPtr<SWindow,0> const &,bool,EOutputCanBeNullptr) [TabManager.cpp:1555] UE4Editor-Slate!FTabManager::RestoreArea(TSharedRef<FTabManager::FArea,0> const &,TSharedPtr<SWindow,0> const &,bool,EOutputCanBeNullptr) [TabManager.cpp:1382] UE4Editor-Slate!FTabManager::RestoreFrom(TSharedRef<FTabManager::FLayout,0> const &,TSharedPtr<SWindow,0> const &,bool,EOutputCanBeNullptr) [TabManager.cpp:865] UE4Editor-UnrealEd!SStandaloneAssetEditorToolkitHost::RestoreFromLayout(TSharedRef<FTabManager::FLayout,0> const &) [SStandaloneAssetEditorToolkitHost.cpp:135] UE4Editor-UnrealEd!SStandaloneAssetEditorToolkitHost::SetupInitialContent(TSharedRef<FTabManager::FLayout,0> const &,TSharedPtr<SDockTab,0> const &,bool) [SStandaloneAssetEditorToolkitHost.cpp:62] UE4Editor-UnrealEd!FAssetEditorToolkit::InitAssetEditor(EToolkitMode::Type,TSharedPtr<IToolkitHost,0> const &,FName,TSharedRef<FTabManager::FLayout,0> const &,bool,bool,TArray<UObject *,TSizedDefaultAllocator<32> > const &,bool,bool) [AssetEditorToolkit.cpp:271] UE4Editor-UnrealEd!FAssetEditorToolkit::InitAssetEditor(EToolkitMode::Type,TSharedPtr<IToolkitHost,0> const &,FName,TSharedRef<FTabManager::FLayout,0> const &,bool,bool,UObject *,bool,bool) [AssetEditorToolkit.cpp:60] UE4Editor-StaticMeshEditor!FStaticMeshEditor::InitStaticMeshEditor(EToolkitMode::Type,TSharedPtr<IToolkitHost,0> const &,UStaticMesh *) [StaticMeshEditor.cpp:267] UE4Editor-StaticMeshEditor!FStaticMeshEditorModule::CreateStaticMeshEditor(EToolkitMode::Type,TSharedPtr<IToolkitHost,0> const &,UStaticMesh *) [StaticMeshEditorModule.cpp:51] UE4Editor-AssetTools!FAssetTypeActions_StaticMesh::OpenAssetEditor(TArray<UObject *,TSizedDefaultAllocator<32> > const &,TSharedPtr<IToolkitHost,0>) [AssetTypeActions_StaticMesh.cpp:75] UE4Editor-UnrealEd!UAssetEditorSubsystem::OpenEditorForAsset(UObject *,EToolkitMode::Type,TSharedPtr<IToolkitHost,0>,bool) [AssetEditorSubsystem.cpp:363] UE4Editor-UnrealEd!UAssetEditorSubsystem::OpenEditorForAssets_Advanced(TArray<UObject *,TSizedDefaultAllocator<32> > const &,EToolkitMode::Type,TSharedPtr<IToolkitHost,0>) [AssetEditorSubsystem.cpp:437] UE4Editor-UnrealEd!UAssetEditorSubsystem::OpenEditorForAssets(TArray<UObject *,TSizedDefaultAllocator<32> > const &) [AssetEditorSubsystem.cpp:553] UE4Editor-ContentBrowserAssetDataSource!ContentBrowserAssetData::EditOrPreviewAssetFileItems(TArrayView<TSharedRef<FContentBrowserAssetFileItemDataPayload const ,0> const ,int>,bool) [ContentBrowserAssetDataCore.cpp:287] UE4Editor-ContentBrowserAssetDataSource!ContentBrowserAssetData::EditOrPreviewItems(IAssetTools *,UContentBrowserDataSource const *,TArrayView<FContentBrowserItemData const ,int>,bool) [ContentBrowserAssetDataCore.cpp:307] UE4Editor-ContentBrowserAssetDataSource!UContentBrowserAssetDataSource::BulkEditItems(TArrayView<FContentBrowserItemData const ,int>) [ContentBrowserAssetDataSource.cpp:932] UE4Editor-ContentBrowser!SContentBrowser::OnItemsActivated(TArrayView<FContentBrowserItem const ,int>,EAssetTypeActivationMethod::Type) [SContentBrowser.cpp:2238] UE4Editor-ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,void ,FDefaultDelegateUserPolicy>::Execute(TArrayView<FContentBrowserItem const ,int>,EAssetTypeActivationMethod::Type) [DelegateInstancesImpl.h:290] UE4Editor-ContentBrowser!SAssetView::OnListMouseButtonDoubleClick(TSharedPtr<FAssetViewItem,0>) [SAssetView.cpp:3446] UE4Editor-ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,void ,FDefaultDelegateUserPolicy>::ExecuteIfSafe(TSharedPtr<FAssetViewItem,0>) [DelegateInstancesImpl.h:307] UE4Editor-ContentBrowser!TDelegate<void ,FDefaultDelegateUserPolicy>::ExecuteIfBound<void,0>(TSharedPtr<FAssetViewItem,0>) [DelegateSignatureImpl.inl:599] UE4Editor-ContentBrowser!SListView<TSharedPtr<FAssetViewItem,0> >::Private_OnItemDoubleClicked(TSharedPtr<FAssetViewItem,0>) [SListView.h:1074] UE4Editor-ContentBrowser!STableRow<TSharedPtr<FAssetViewItem,0> >::OnMouseButtonDoubleClick(FGeometry const &,FPointerEvent const &) [STableRow.h:458] UE4Editor-Slate!static class FReply FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_2b5148752c2a272000c47b69ff14a42e> >(class FSlateApplication *, class FEventRouter::FBubblePolicy, struct FPointerEvent, const class FSlateApplication::RoutePointerDoubleClickEvent::__l2::<lambda_2b5148752c2a272000c47b69ff14a42e> & const, ESlateDebuggingInputEvent) [SlateApplication.cpp:378] UE4Editor-Slate!FSlateApplication::RoutePointerDoubleClickEvent(FWidgetPath const &,FPointerEvent const &) [SlateApplication.cpp:5281] UE4Editor-Slate!FSlateApplication::ProcessMouseButtonDoubleClickEvent(TSharedPtr<FGenericWindow,0> const &,FPointerEvent const &) [SlateApplication.cpp:5268] UE4Editor-Slate!FSlateApplication::OnMouseDoubleClick(TSharedPtr<FGenericWindow,0> const &,EMouseButtons::Type,FVector2D) [SlateApplication.cpp:5231] UE4Editor-ApplicationCore!FWindowsApplication::ProcessDeferredMessage(FDeferredWindowsMessage const &) [WindowsApplication.cpp:2178] UE4Editor-ApplicationCore!FWindowsApplication::DeferMessage(TSharedPtr<FWindowsWindow,0> &,HWND__ *,unsigned int,unsigned _int64,_int64,int,int,unsigned int) [WindowsApplication.cpp:2638] UE4Editor-ApplicationCore!FWindowsApplication::ProcessMessage(HWND__ *,unsigned int,unsigned _int64,_int64) [WindowsApplication.cpp:1042] UE4Editor-ApplicationCore!FWindowsApplication::AppWndProc(HWND__ *,unsigned int,unsigned _int64,_int64) [WindowsApplication.cpp:874] USER32!7ff892440000 + e858 USER32!7ff892440000 + e4ee InkObj!7ff80c180000 + e7e19 atlthunk!7ff88a090000 + 1028 USER32!7ff892440000 + e858 USER32!7ff892440000 + e299 UE4Editor-ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages(bool) [WindowsPlatformApplicationMisc.cpp:130] UE4Editor!7ff6d49d0000 + 87e7 UE4Editor!7ff6d49d0000 + 2113c UE4Editor!7ff6d49d0000 + 2121a
i have this problem UE4CC-Windows-58DC12AF4B97F057BD108FBFF569B2E9_0000
I am not able to find world outliner how to enable it?
How can i modify the param name in EQS node
Undefined sysmbol: typeinfo for AActor when cross-compile linux dedicated server on windows
How to achieve HLSL Multiple Render Target in Material blueprints?
Teleporter in the Creative Hub is Locked and cannot be accessed
What method is used to fill polygonal regions when drawing spline mesh at run time?
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-107204 in the post.