Mod preview crash

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION writing address
0x3f73ab10

MSVCR120.dllUnknownFunction (0x000007fed8cec9e7) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x000007fee8fe35d5) + 0 bytes
[UnknownFile:0]
UE4Editor-ShooterGame.dll!UnknownFunction (0x0000007fedcec00fb) + 0 bytes
[UnknownFile:0]
UE4Editor.exe!Unknownfunction (0x000000013f71f3a7) + 0 bytes [UnknownFile:0]
UE4Editor.exe!Unknownfunction (0x000000013f71ec54) + 0 bytes [UnknownFile:0]
UE4Editor.exe!Unknownfunction (0x000000013f71ed7a) + 0 bytes [UnknownFile: 0]
UE4Editor.exe!Unknownfunction (0x000000013f72aa10) + 0 bytes [UnknownFile: 0]
UE4Editor.exe!Unknownfunction (0x000000013f72b949) + 0 bytes [UnknownFile: 0]
kernal32.dll!UnknownFunction (0x0000000776459cd) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00000007777b981) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00000007777b981) + 0 bytes [UnknownFile:0]