Invalid access to memory - _ne_sspi_init

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.17.10

Error message:
Invalid access to memory.

Stack trace:
(0004A4AB) ntdll.dll
(00F8A13A) C5296_0
(00F8C1A2) ____ExceptionHandler
(00F88F5C) __ExceptionHandler
(0008788F) ntdll.dll
(00073EC1) ntdll.dll.KiUserExceptionDispatcher
(00050498) ntdll.dll.RtlEqualUnicodeString
(0005D634) ntdll.dll
(0005D12D) ntdll.dll
(0004D825) ntdll.dll
(0004D207) ntdll.dll
(0004CE91) ntdll.dll.LdrLoadDll
(0010F6C0) KERNELBASE.dll.LoadLibraryExW
(0000DEC8) SSPICLI.DLL.SspiGetComputerNameForSPN
(0000DB8A) SSPICLI.DLL.SspiGetComputerNameForSPN
(0001418F) SSPICLI.DLL.QuerySecurityPackageInfoA
(00BC8927) C2573_0
(00BC8A73) C2573_0
(00BC8B2C) _ne_sspi_init
(00F8814D) __wstartup
(00066A7C) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066A49) ntdll.dll.RtlGetAppContainerNamedObjectPath

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.19.5

Error message:
Invalid access to memory.

Stack trace:
(00077913) ntdll.dll.memcpy
(00FC4482) C5294_3
(00FC64EA) ____ExceptionHandler
(00FC32A4) __ExceptionHandler
(000878AF) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(00008FA2) SSPICLI.DLL
(0000A669) SSPICLI.DLL
(0000A370) SSPICLI.DLL
(0001A5BF) SSPICLI.DLL.QuerySecurityPackageInfoA
(00BF39A7) C2567_0
(00BF3ABA) C2567_0
(00BF3BAC) _ne_sspi_init
(00FC2495) C5162_0
(00066A9C) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066A69) ntdll.dll.RtlGetAppContainerNamedObjectPath

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

@johnc925: Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.