Upgrading probably won’t help. I had the same problem when I setup my account (and mine is a paid account).
I had to send an email to support. I did get an email with the order number (hopefully you did too). Put the order number in the subject line as specified here.
Put something like “LO registration is pending” after the order number in the subject and then the full screen message in the email (probably could just copy your post above and send that).
Took them a couple days to figure it out for me… hopefully it won’t take them as long for you.