One of my client's NW6.0 servers suddenly started having the error message

Loading in address space Ifoldeer [crit] (10022) Unknown error:
make_secure_socket for address xxx.xxx.xxx.xxx port 443 WSAIoctl:
(SO_SSL_SET_SERVER)

I think this started to occur after that particular server was rebooted
after a power failure. Other than this new error, the server has been
working perfectly for years. It is most annoying because it stops the load
process until a human being intervenes.

Can you tell me how to fix it?

Thanks,

Vern