Engine start exception

Hi,
when engine start with Debug-Editor, a exception be thrown.
I’m using UE4 4.26.2 github source code,windows 10 1909,visual studio 2019.

output:
Exception thrown at 0x00007FFCDF673B19 (in UE4Editor-Win64-Debug.exe): Microsoft C++ Exception: int at memory location 0x0000001F892FFC38.

code:
function: int32 TcpSocketAccept(UPTRINT Socket, UPTRINT& Out)
line: Inner = accept(Inner, nullptr, nullptr)

Best wishes,
Dian

Has anyone encountered this problem? please help