Same thing happens to me. Started on the 28th. I can log in to the web site. For a few days, I could not.
Also, for a few days, I could not retrieve data from the server. Now I can. Files are visible.
But when scheduled or forced back-ups occur, they fail because it could not connect with the server.
I am a private individual on an iMac. I'm using version 2.0.0. and have been a customer for eight years.
I have no anti-virus or firewall running that did not come from Apple. No updates there for 30+ days. 1Password updated on the 27th, but iDrive ran that night.
The idea that it might be an intermittent Internet connection is laughable. No other site or service is affected.
I have a ticket open and they were to contact me on Friday. Didn't happen. (Don't want to put the ticket number on-line.)
What's going on?