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

<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 5.7.3

Error message:
Invalid access to memory.

Stack trace:
(0070D7F8)
(0007911F) ntdll.dll
(00066BFA) ntdll.dll.KiUserExceptionDispatcher
(00381F98)
(00169AAE)
(001DB916)
(001DB994)