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

Error message:
Error getting name of current remote directory.

Invalid access to memory.

Stack trace:
[0110B5C2] EnableControl
[011605DE] C4725_0
[01162646] ____ExceptionHandler
[0115F5C0] __ExceptionHandler
[7758B466] ntdll.dll
[7754012E] ntdll.dll.KiUserExceptionDispatcher
[010B90DB] TConsoleDialog::DoChangeDirectory
[01090A1E] TTerminal::ReadCurrentDirectory
[0108C892] TTerminal::ReactOnCommand
[00F93D53] TUnixDirView::ChangeDirectory
[00F92216] TUnixDirView::ExecuteParentDirectory
[00D59FD0] Customdirview::TCustomDirView::Execute
[00B9C755] Vcl::Controls::TWinControl::WndProc
[00BE0683] Vcl::Comctrls::TCustomListView::WndProc
[00CC0678] System::Classes::_18201
[769D62F7] USER32.dll
[769D6D35] USER32.dll
[769E0D22] USER32.dll
[769E0D48] USER32.dll.CallWindowProcW
[00D7F24F] Dragdrop::TDragDrop::WndMethod
[00CC0678] System::Classes::_18201
[769D62F7] USER32.dll
[769D6D35] USER32.dll
[769D77BF] USER32.dll
[769D7885] USER32.dll.DispatchMessageW