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:
[004C0044] System::Character::_16412
[009005DE] C4725_0
[00902646] ____ExceptionHandler
[008FF5C0] __ExceptionHandler
[77C8027E] ntdll.dll.ZwWow64CallFunction64
[77C809FA] ntdll.dll.KiUserExceptionDispatcher
[00830A1E] TTerminal::ReadCurrentDirectory
[0082C892] TTerminal::ReactOnCommand
[00733D53] TUnixDirView::ChangeDirectory
[007321B2] TUnixDirView::ExecuteFile
[0033C755] Vcl::Controls::TWinControl::WndProc
[00380683] Vcl::Comctrls::TCustomListView::WndProc
[00460678] System::Classes::_18201
[776B8E6F] USER32.DLL.CallNextHookEx
[776B90CC] USER32.DLL
[776BDDD0] USER32.DLL.CallWindowProcW
[71EBD83F] COMCTL32.DLL.DefSubclassProc
[71EBD821] COMCTL32.DLL.DefSubclassProc
[71EAC42B] COMCTL32.DLL
[71EBD5F0] COMCTL32.DLL
[776B8E6F] USER32.DLL.CallNextHookEx
[776B90CC] USER32.DLL
[776BDDD0] USER32.DLL.CallWindowProcW
[0051F24F] Dragdrop::TDragDrop::WndMethod
[00460678] System::Classes::_18201
[776B8E6F] USER32.DLL.CallNextHookEx
[776B90CC] USER32.DLL
[776BA66A] USER32.DLL
[776BA6DB] USER32.DLL.DispatchMessageW