<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:
Не могу получить имя каталога на сервере.

Ошибка доступа к памяти.

Трассировка стека:
(0033F031)WinSCP.exe
(007E08AA) __DynamicCast
(007E2912) C4799_3
(007DF88C) __totalsec
(0008112F) ntdll.dll
(0006ECCA) ntdll.dll.KiUserExceptionDispatcher
(00714252) TTerminal::CustomCommandOnFiles
(00710206) TTerminal::FileModified
(00616007) TCustomUnixDriveView::SetTerminal
(006144B6) __tpdsc__ TUnixDirView
(003D9EB8) Customdirview::TCustomDirView::DoAnimation
(0021C609) Vcl::Controls::TWinControl::WMSysColorChange
(00260537) Vcl::Comctrls::TCustomListView::GetNextItem
(0034059C) System::Classes::TObserverMapping::operator ...
(0002BD41) USER32.dll
(0000DBAA) USER32.dll
(0000D032) USER32.dll.CallWindowProcW
(000574B9) COMCTL32.DLL
(0005758E) COMCTL32.DLL
(0005732C) COMCTL32.DLL
(0002BD41) USER32.dll
(0000DBAA) USER32.dll
(0000D032) USER32.dll.CallWindowProcW
(003FF173) Dragdrop::TDragDrop::SetSourceEffects
(0034059C) System::Classes::TObserverMapping::operator ...
(0002BD41) USER32.dll
(0000DBAA) USER32.dll
(0000D2FF) USER32.dll
(0000D0BB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.