<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 5.7.7

Error message:
External exception C000001D

Трассировка стека:
(0062F06E) TConfiguration::LoadData
(0008A61F) ntdll.dll
(00077E7A) ntdll.dll.KiUserExceptionDispatcher
(00714252) TTerminal::ReadCurrentDirectory
(00710206) TTerminal::ReactOnCommand
(00616007) TUnixDirView::ChangeDirectory
(006144B6) TUnixDirView::ExecuteParentDirectory

The problem happens rarely. I cannot reproduce it.