Ue4.5 stable crash with this error popup
Assertion failed: Atom1.IsRotationNormalized() [File:d:\unreal\engine\source\runtime\core\public\math\TransformVectorized.h] [Line: 378]
KERNELBASE.dll!UnknownFunction (0x00007ffcde5cab78) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffcc6317c2d) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffcc61b5878) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffcc6198632) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffcc4021364) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffcc3fb841a) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffcc3fa8deb) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffcc3fa8c4c) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffcc4039d4e) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffcc4013cd6) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffcc403daf2) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffcc3735ecb) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffcc1db01c3) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffcc1daf983) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffcc1daff36) + 0 bytes [UnknownFile:0]
UE4Editor-AssetTools.dll!UnknownFunction (0x00007ffcbb5bd741) + 0 bytes [UnknownFile:0]
UE4Editor-AssetTools.dll!UnknownFunction (0x00007ffcbb553b94) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffcc2114c8d) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffcc20d33ff) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffcc32a551a) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffcc32c23d5) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffcc321e04c) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffcc320b786) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffcc62979a9) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffcc6283eab) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffcc6298b29) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffcc62807f2) + 0 bytes [UnknownFile:0]
USER32.dll!UnknownFunction (0x00007ffce08d2524) + 0 bytes [UnknownFile:0]
USER32.dll!UnknownFunction (0x00007ffce08d2387) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffcc6298fe6) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff76f308f22) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff76f2feb0e) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff76f2feb7a) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff76f30a6f9) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff76f30b629) + 0 bytes [UnknownFile:0]
KERNEL32.DLL!UnknownFunction (0x00007ffce07915cd) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffce11343d1) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffce11343d1) + 0 bytes [UnknownFile:0]