Cannot change Visible in OnShow or OnHide

Hi Team,
We are in critical situation with WinSCP 5.11.1 version with users machine. Please help us with solution on Priority.

WinSCP 5.11.1

Error message:
Cannot change Visible in OnShow or OnHide

Stack trace:
(00215C30) Vcl::Forms::TCustomForm::CMShowingChanged
(0002336B) TCustomScpExplorerForm::CMShowingChanged
(0002322E) TCustomScpExplorerForm::Dispatch
(00257BA1) Vcl::Controls::TWinControl::WndProc
(00212068) Vcl::Forms::TCustomForm::WndProc
(0083B8E0) Vclcommon::C2751_0

Thanks,
Ramesh
+918746078764

Did you try upgrading to the latest version of WinSCP?

WinSCP 5.11.1 is almost 5 years old.