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:
External exception EEFFACE

Stack trace:
[77492F71] KERNELBASE.dll.RaiseException
[77C1027E] ntdll.dll.ZwWow64CallFunction64
[77C109FA] ntdll.dll.KiUserExceptionDispatcher
[013067E0] Jclhookexcept::_16408
[01650E32] C4725_0
[0165217C] _ThrowExceptionLDTC
[016361AC] C2769_0
[01545D69] TSFTPFileSystem::ReceivePacket
[015470DC] TSFTPFileSystem::ReceiveResponse
[015472D9] TSFTPFileSystem::SendPacketAndReceiveResponse
[01547741] TSFTPFileSystem::RealPath
[01547E6E] TSFTPFileSystem::RealPath
[01556175] TSFTPFileSystem::ChangeDirectory
[01587C7E] TTerminal::ChangeDirectory
[01483D53] TUnixDirView::ChangeDirectory