[CrashReport] UE4Editor_SlateCore!FHittestGrid::FindFocusableWidget<<lambda_3a8b364273a2882da220e6e492096c17>,<lambda_d0075a811a928600995d1b2de6795365>,<lambda_105424556dbaeebf7f5bf9bed3e2f737> >() [hittestgrid.cpp:397]

  394       		for (StrideCellPoint[StrideAxis] = StrideAxisMin; StrideCellPoint[StrideAxis] <= StrideAxisMax; ++StrideCellPoint[StrideAxis])
  395       		{
  396 ***** 			FHittestGrid::FCell& Cell = FHittestGrid::CellAt(StrideCellPoint.X, StrideCellPoint.Y);
  397       			const TArray<int32>& IndexesInCell = Cell.CachedWidgetIndexes;
  398       
  399       			for (int32 i = IndexesInCell.Num() - 1; i >= 0; --i)
  400       			{
  401       				int32 CurrentIndex = IndexesInCell[i];
  402       				check(CurrentIndex < WidgetsCachedThisFrame.Num());
  403       
  404       				const FCachedWidget& TestCandidate = WidgetsCachedThisFrame[CurrentIndex];
  405       				FSlateRect TestCandidateRect = TestCandidate.CachedGeometry.GetRenderBoundingRect().OffsetBy(-GridOrigin);

Assertion failed: (Y*NumCells.X + X) < Cells.Num() [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\SlateCore\Public\Input/HittestGrid.h] [Line: 197] HitTestGrid CellAt() failed: X= 7 Y= 2 NumCells.X= 7602273 NumCells.Y= 6488169 Cells.Num()= 0

UE4Editor_SlateCore!FHittestGrid::FindFocusableWidget<<lambda_328c6d0d0166105d213a5d47492558f6>,<lambda_740cd12cbf74afea512676f4d2fe0e0a>,<lambda_841dafa927b0b06313e544636f2f0df0> >() hittestgrid.cpp:399
UE4Editor_SlateCore!FHittestGrid::FindNextFocusableWidget() hittestgrid.cpp:543 
UE4Editor_Slate!FSlateApplication::AttemptNavigation() slateapplication.cpp:6376 
UE4Editor_Slate!FSlateApplication::ProcessReply() slateapplication.cpp:3378 
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FKeyEvent,<lambda_2afcd964c763e269e2d1a63f3a72f846> >() slateapplication.cpp:271 
UE4Editor_Slate!FSlateApplication::ProcessKeyDownEvent() slateapplication.cpp:5097 
UE4Editor_Slate!FSlateApplication::OnKeyDown() slateapplication.cpp:5009 
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1666 
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() windowsapplication.cpp:2281 
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() windowsapplication.cpp:929 
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() windowsapplication.cpp:766 
user32!UserCallWinProcCheckWow() 
user32!DispatchMessageWorker() 
UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() windowsplatformapplicationmisc.cpp:130 
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:3615 
UE4Editor!GuardedMain() launch.cpp:174 
UE4Editor!GuardedMainWrapper() launchwindows.cpp:145 
UE4Editor!WinMain() launchwindows.cpp:276 
UE4Editor!__scrt_common_main_seh() exe_common.inl:283 
kernel32!BaseThreadInitThunk() 
ntdll!RtlUserThreadStart()