Hey @PeterLarsen1986, welcome to the community!
If you're having trouble creating an account for your daughter, try following these steps.
In case you can't find an account, but still get the same error messages, try clearing your browser's cache and cookies to set up the account.
Let me know how it goes.
“Music acts like a magic key, to which the most tightly closed heart opens.”
― Maria Augusta von Trapp