Norton Identity Safe does not synchronize to https://identitysafe.norton.com/

Hi, I just downloaded Norton Identity Safe, I created an account and a vault, and imported all my credentials from a CSV file. So far so good.

Then I logged in to https://identitysafe.norton.com/, opened my vault and it's empty.

Subsequently, none of my credentials synchronize to my phone app.

What can I do to resolve this issue?

Thanks