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.

<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 5.7.1

Error message:
Ошибка доступа к памяти.

Трассировка стека:
[0107D820]
[77B1007E] ntdll.dll.ZwWow64CallFunction64
[77B107FA] ntdll.dll.KiUserExceptionDispatcher
[00CF2888]
[00ADA39E]
[00B4C206]
[00B4C284]

Status: symbol_unknown

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.