I'm trying to set up 1password on a new iPad Pro. I already have it working on my Mac and iPhone. When I try to sign in on the iPad I get "No response code from server". I tried setting up the account by scanning the QR code displayed on my phone, and I also tried entering all the details by hand, but they both give the same error. I also tried shutting down and restarting the iPad but it didn't help. 1password is working fine on the phone and Mac; all 3 devices are using the same account and on the same network, and the phone has the same versions of iOS and 1password. There's nothing wrong with the iPad's connection, any other app that connects to the internet works fine.
1Password Version: 6.9.1
Extension Version: Not Provided
OS Version: iOS 11.0.3
Sync Type: Not Provided