<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 5.11.2

Error message:
Invalid access to memory.

Stack trace:
(0009480B) TTerminalManager::TerminalQueryUser
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(006E3DD1) TQueryUserAction::Execute
(006E0B59) TQueueItemProxy::ProcessUserAction
(000173FA) TCustomScpExplorerForm::UserActionTimer
(0022E70F) Vcl::Extctrls::TTimer::Timer
(0037BC78) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW