what is this error:
LoginId:2147838d4215871f8751bc811209bfec
EpicAccountId:a1f67f9697aa4a618b7343819c7ada83
Assertion failed: [File:D:\Build++UE4\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Util.cpp] [Line: 198] Unreal Engine is exiting due to D3D device being lost. (Error: 0x887A0006 - ‘HUNG’)
UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_D3D11RHI
UE4Editor_D3D11RHI
UE4Editor_D3D11RHI
UE4Editor_D3D11RHI
UE4Editor_RHI
UE4Editor_RHI
UE4Editor_RHI
UE4Editor_RHI
UE4Editor_SlateRHIRenderer
UE4Editor_SlateRHIRenderer
UE4Editor_Core
UE4Editor_Core
UE4Editor_RenderCore
UE4Editor_RenderCore
UE4Editor_Core
UE4Editor_Core
kernel32
ntdll