Error changing directory to '/' - _ne_addr_resolve

Can not connect on to the WebDAV on Windows Server 2012R2

WinSCP 5.11.2

Error message:
Error changing directory to '/'.

Invalid access to memory.

Stack trace:
#0061EA3F# _ne_addr_resolve
#0089C9C2# C5067_3
#0089EA2A# ____ExceptionHandler
#0089B7E4# __ExceptionHandler
#0003EE3E# ntdll.dll.ZwWow64CallFunction64
#0003F5BA# ntdll.dll.KiUserExceptionDispatcher
#00620C85# _ne_sspi_deinit
#00620D50# _ne_sspi_create_context
#00616A9F# C2373_0
#00616B27# C2373_0
#006187DB# _is_passport_challenge
#00618B92# _is_passport_challenge
#0061CD00# _ne_end_request
#0061CE56# _ne_request_dispatch
#00623BFB# _ne_propfind_get_request
#00623CDF# _ne_propfind_allprop
#0062478F# _ne_simple_propfind
#007BAA2E# TWebDAVFileSystem::CustomReadFileInternal
#007BAB59# TWebDAVFileSystem::CustomReadFile
#007B9C5A# TWebDAVFileSystem::ReadFile
#007B96A2# TWebDAVFileSystem::TryOpenDirectory
#007B9779# TWebDAVFileSystem::ChangeDirectory
#007A58CA# TTerminal::ChangeDirectory
#0079B28E# TTerminal::SetCurrentDirectoryW
#0066C4AA# TUnixDirView::SetPath
#0001B289# TCustomScpExplorerForm::DoOpenDirectoryDialog
#00045968# TScpCommanderForm::DoOpenDirectoryDialog
#00015543# TCustomScpExplorerForm::OpenDirectory
#003BDDBC# System::Actions::TContainedActionList::ExecuteAction
#001A4EF5# Vcl::Actnlist::TCustomAction::Execute
#0037BC78# System::Classes::_18201
#00007E6F# USER32.DLL.CallNextHookEx
#000080CC# USER32.DLL
#00009625# USER32.DLL
#0000967B# USER32.DLL.DispatchMessageW

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.