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 5.13.8

Error message:
Acceso a memoria no válido

Traza de la pila:
(00435C66)
(008BF99A)
(008C1A02)
(008BE7BC)
(00083FFF) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(0043505D)
(00434F68)
(0043506D)
(00434F68)
(0043503E)
(00434F68)
(0043506D)
(004351AE)
(004369ED)
(004256FE)
(00436A9C)
(004289B6)
(0042D797)
(00043202)
(00042F00)
(00023F03)
(00023DC6)
(0025BD51)
(00216218)
(0085DCD0)

Status: unknown_rel_addr

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.