Most likely reason for error — incomplete copying of email link to browser (assuming you did not click on the within-email button). Alternatively, link corrupted by email process itself. Least likely, but possible, coding error and/or Brevo list server down or erroring.

In any case, simply try to sign up again via the website (link and directions on homepage under Sign-up). You should then receive a fresh email requesting confirmation.

(It may take several minutes for the email to appear in your inbox. If it never arrives, the standard comments of checking your spam/junk folder(s) etc. apply. If all else fails, simply email "Subscribe" to <subscriptions2025@daviddurlach.com>. In all cases, you may expect a final email confirming you are properly signed up.)