<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 5.19.4

Error message:
Acceso a memoria no válido

Traza de la pila:
(90C3B033)WinSCP.exe
(0008A61F) ntdll.dll
(00077E7A) ntdll.dll.KiUserExceptionDispatcher
(00CFEC5A) TRemoteFile::GetIsInaccesibleDirectory
(00C71555) TCustomUnixDriveView::UpdatePath
(00C71A89) TCustomUnixDriveView::LoadPathEasy
(00C71608) TCustomUnixDriveView::UpdatePath
(00C71A89) TCustomUnixDriveView::LoadPathEasy
(00C71608) TCustomUnixDriveView::UpdatePath
(00C71A89) TCustomUnixDriveView::LoadPathEasy
(00C71608) TCustomUnixDriveView::UpdatePath
(00C71A89) TCustomUnixDriveView::LoadPathEasy
(00C71C7F) TCustomUnixDriveView::LoadPath
(00C71BF8) TCustomUnixDriveView::LoadPath
(00C71BF8) TCustomUnixDriveView::LoadPath
(00C71D28) TCustomUnixDriveView::LoadDirectory
(00C6DFAF) TUnixDirView::DoReadDirectoryImpl
(000071A2) TCustomScpExplorerForm::DoSetTerminal
(00007152) TCustomScpExplorerForm::SetTerminal
(000B0B82) TTerminalManager::SetActiveTerminal
(000215C4) TCustomScpExplorerForm::SessionsPageControlChange
(00280315) Vcl::Controls::TWinControl::WndProc
(0027B40C) Vcl::Controls::TControl::Perform
(0028047B) Vcl::Controls::_17076
(00280315) Vcl::Controls::TWinControl::WndProc
(0023A7DC) Vcl::Forms::TCustomForm::WndProc

The problem happens rarely. I cannot reproduce it.