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Cloudflare Universal SSL and regular Dedicated SSL certificates only cover the root-level domain (example.com) and one level of subdomains (*.example.com). If visitors to your domain observe errors accessing a second level of subdomains in their browser (such as dev. (138)Even with a Cloudflare SSL certificate provisioned for your domain, older browsers display errors about untrusted SSL certificates because they do not support the Server Name Indication (SNI) protocol used by Cloudflare Universal SSL certificates. Determine if your browser supports SNI. (118)If you observe SSL errors and do not have a certificate of Type Universal within the Edge Certificates tab of the Cloudflare SSL/TLS app for your domain, the Universal SSL certificate has not yet provisioned. (100)