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.
<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 5.17.7
Error message:
Failed to set object at index 2
Stapelverfolgung:
(002A6061) Vcl::Comctrls::_16736
(0038AB1F) System::Classes::TStrings::InsertObject
(002A8358) Vcl::Comctrls::TPageControl::InsertTab
(002A7972) Vcl::Comctrls::TTabSheet::SetTabShowing
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.