Update: I emailed BBO support and got this reply today Thank you for contacting BBO. We want to inform you that after reviewed your report, we find out that the cause is related to an expired root certificate used by our SSL service. A root SSL certificate error occurs when a web browser can’t verify the certificate installed on a site. Rather than connect you, your browser will display an error message, warning you that the site may be insecure/not accessible. This might happened if you are using an old operative system or device. In order to access normally to BBO (or to any other site where you see these type of message/error) you can: • Try login from Firefox, • Add bridgebase.com as trusted site under your browser settings • Update your current operative system, In case you have questions about how to perform any of these steps, or in case you have further questions, please do not hesitate to contact us again.