Are you signed out of the first one? I used it the first week and had signed in on my phone, then couldn't get my laptop to work until I specifically signed out of my phone (although it didn't give me any error message to indicate that was the problem.)
I also had a similar issue, contacted customer support and they told me the issue was that my country and address needed to be updated in my account, that fixed it until I had the issue mentioned above about being logged in on multiple devices.