This warning most frequently occurs when an SSL certificate (security certificate) has expired. SSL allows your site to show "HTTPS" in the URL, and signifies to your site visitors that you have taken steps to ensure a secure user experience.
SSL certificates are typically set up and managed within your hosting environment, domain manager or a third-party site, and they must be renewed annually. You may see this error if the credit card you have on file has expired or if you forgot to renew your SSL certificate.
If you are unable to determine where your SSL certificate was set up, contact the Flair team via our help desk so we can help you troubleshoot this.