Failed to contact Unity Accounts
I have a Unity account and can sign into it at https://id.unity.com. I installed version 4.6.2 to work on an old project. I expect to be able to enter a perpetual license key we have to do development on the old project. The dialog to "Log into your Unity Account" comes up and I enter my same email and password, but clicking the "Login" button results in the error message "Failed to contact Unity Accounts, please retry or contact support." So despite using the same email and password that works to sign in on the web, the login dialog does not work.
How do I make the login work?
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