<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:
Invalid access to memory.

Stack trace:
(000DF04B) Vcl::Styles::TCustomStyle::DoGetElementSize
(00052DD6) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(007126BE) TTerminal::CommandError
(00712451) TTerminal::CommandError
(0071B5C2) TTerminal::ChangeDirectory
(007113FA) TTerminal::SetCurrentDirectoryW
(0061594A) TUnixDirView::SetPath
(0003FFC2) TScpCommanderForm::RemotePathLabelPathClick
(003CCA09) Pathlabel::TCustomPathLabel::DoPathClick
(003CAE46) Pathlabel::TCustomPathLabel::Click
(002184C5) Vcl::Controls::TControl::WMLButtonUp
(00217700) Vcl::Controls::TControl::Perform
(0021BED7) Vcl::Controls::TWinControl::IsControlMouseMsg
(0021BC50) Vcl::Controls::TWinControl::MainWndProc
(0034059C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167CE) USER32.dll
(00016895) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.