Comment 3 for bug 1466009

No, the U1 account is not using a webview.
There might be something wrong with the apparmor profile of the system settings app, because the message

    RequestAccess failed: QDBusError("com.ubuntu.OnlineAccountsUi.InvalidApplication", "Invalid client application")

hints at something in that direction.

Alan, can you please run a "ps -feZ | grep system-settings" and see what's the first field there?

Last but not least, does this happen with other account types as well (google, facebook)?