Ue 4.21.1 crash alltime

hi everyone , i have ue 4.21.1 and this is crash alltime after using in 20s
pls help me , i dont know why
My laptop is i7-7700hq ram 16gb with 1050 gefore and i use win 10 pro 64bit
This is the log

[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SyncInterval 0
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.BufferDesc.Width 463
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.BufferDesc.Height 123
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.BufferDesc.RefreshRate.Numerator 0
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.BufferDesc.RefreshRate.Denominator 0
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.BufferDesc.Format 24
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.BufferDesc.ScanlineOrdering 0
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.BufferDesc.Scaling 0
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.SampleDesc.Count 1
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.SampleDesc.Quality 0
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.BufferUsage 48
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.BufferCount 1
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.OutputWindow 0000000000080734
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.Windowed true
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.SwapEffect 0
[2019.01.17-11.25.35:232][ 24]LogRHI: Error: SwapChainDesc.Flags 2
[2019.01.17-11.25.35:232][ 24]LogD3D11RHI: Error: Result failed
at D:\Build++UE4\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Viewport.cpp:361
with error 8876017C
[2019.01.17-11.25.35:232][ 24]LogWindows: Windows GetLastError: The operation completed successfully. (0)

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