Invalid access to memory - _X509_alias_get0

<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 5.15.5

Error message:
Invalid access to memory.

Stack trace:
(0061BB81) _X509_alias_get0
(0092827A) C5157_3
(0092A2E2) ____ExceptionHandler
(0092709C) __ExceptionHandler
(0003EF0E) ntdll.dll.ZwWow64CallFunction64
(0003F68A) ntdll.dll.KiUserExceptionDispatcher
(0068A1A0) _ne_ssl_clicert_create
(00843A05) TWebDAVFileSystem::NeonProvideClientCert
(00689A73) _ne_ssl_cert_validity_time
(008DC807) _ssl_do_client_cert_cb
(008DBF30) _ssl3_send_client_certificate
(008D767B) _ssl3_connect
(008F48C0) _SSL_connect
(008E4D56) _ssl_fill_hello_random
(008E423F) _ssl23_connect
(008F48C0) _SSL_connect
(0068299C) _ne_sock_connect_ssl
(00689D8E) _ne__negotiate_ssl
(006808D5) _ne_get_session
(0067F819) _ne_read_response_block
(0067FE1F) _ne_begin_request
(00680418) _ne_request_dispatch
(0067CB8D) _ne_options2
(0083DCEE) TWebDAVFileSystem::ExchangeCapabilities
(0083DAA1) TWebDAVFileSystem::NeonOpen
(0083D52D) TWebDAVFileSystem::NeonClientOpenSessionInternal
(0083D3EB) TWebDAVFileSystem::OpenUrl
(0083D123) TWebDAVFileSystem::Open
(00814173) TTerminal::Open
(0074FEFB) TTerminalThread::TerminalOpenEvent
(0074AE58) TSignalThread::Execute
(000BB67F) Userinterface::C20_0
(00015A12) KERNEL32.DLL.BaseThreadInitThunk
(00059D8D) ntdll.dll
(00059D55) ntdll.dll
Connection failed.

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.