I’m pretty sure that site gets shut down from time to time, and then it will pop up again with a new, slightly different URL.
Yes, I’ve experienced that several times but this time it is different. It all of a suddenly quit working at 12:00 am on 4/1/2020. When I tried to connect again, I got the message.
If you find a new url I would appreciate your sharing.
Thank you
That’s been MY experience as well