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 5.7.5

Error message:
Fehler beim Empfang des entfernten Verzeichnisnamens.

Integer overflow

Stack trace:
(0024F02E) Vcl::Comctrls::TTreeNode::GetParent
(007E39EA) C4799_0
(007E5A52) ____ExceptionHandler
(007E29CC) __ExceptionHandler
(0007C61F) ntdll.dll
(00069E6A) ntdll.dll.KiUserExceptionDispatcher
(00712B16) TTerminal::ReadCurrentDirectory
(0070EACA) TTerminal::ReactOnCommand
(00614E2F) TUnixDirView::ChangeDirectory
(0061328E) TUnixDirView::ExecuteFile
(0021C2F9) Vcl::Controls::TWinControl::WndProc
(00260227) Vcl::Comctrls::TCustomListView::WndProc
(0034021C) System::Classes::_18201
(00033921) USER32.dll
(0001378B) USER32.dll
(00013522) USER32.dll.CallWindowProcW
(00076D3A) COMCTL32.DLL
(00076D21) COMCTL32.DLL
(00076B5C) COMCTL32.DLL
(00033921) USER32.dll
(0001378B) USER32.dll
(00013522) USER32.dll.CallWindowProcW
(003FEE43) Dragdrop::TDragDrop::WndMethod
(0034021C) System::Classes::_18201
(00033921) USER32.dll
(0001378B) USER32.dll
(0001308C) USER32.dll
(00012E4B) USER32.dll.DispatchMessageW