Can't get Back to My Mac working in Time Capsule
I just bought a brand new Airport Time Capsule. The internet works. It's the sole router in the network. I wanted to set up Back to My Mac. When I try to enter my apple id and credentials, I get a cryptic error: "An error occurred signing in."
And that's it. No other hints on what's wrong or how to fix it.
Anyone have any ideas?