We have updated Nginx to no longer support TLS v1.1, and to avoid warnings in browsers
See international ref :
https://portswigger.net/daily-swig/the-end-is-nigh-browser-makers-ditch-support-for-aging-tls-1-0-1-1-protocols
If you have problems, the only solution is updating
Our servers are already up to date under TLS 1.2 and 1.3, you can test your domain here : https://www.cdn77.com/tls-test