The original problem description describes my issue today almost exactly. I don't think @brenty really understood what the problem was.
I was trying to create a 1Password account so I could upgrade to 7 from 6 and get the Family plan. I didn't get through the sign-up process when I got the error message mentioned. When I try again, to get any further I need my "Secret Key" that I was never given because I didn't get that far. But without the Secret Key I can't use my email address to continue the process.
I already desired a 1Password.com membership. That is what I was trying to get.
Hi @DRPope! Welcome to the forum!
We will be happy to help you with this. I noticed that you also sent us an email about this issue. So we don't duplicate the answers by replying to you in multiple places, I am going to close this forum discussion and someone will get back to your email as soon as possible.
Thank you for your patience!