The error I got when going to UO.com is something I've never seen before:
"Turn on TLS 1.0, TLS 1.1, and TLS 1.2 in Advanced settings and try connecting to
https://uo.com again. If this error persists, it is possible that this site uses an unsupported protocol or cipher suite such as RC4
(link for the details), which is not considered secure. Please contact your site administrator"