Sorry to report that the fatal error is back. It was a good run, almost a full 24 hours!
This morning when I tried to connect to the same host, that was working last night, the same error came on the host and I cannot connect.
I also upgraded my other host computer to the 7.1.7.0 and I cannot connect to it. The owner of the host is not available yet to advise if they have the same error screen.