Let's Debug

Test result for klima3000.ch using tls-sni-02

Fatal

The validation method provided (tls-sni-02) has been disabled by Let's Encrypt. For more information, please visit the url in the details.

https://community.letsencrypt.org/t/important-what-you-need-to-know-about-tls-sni-validation-issues/50811

Submitted Jul 17 18:19:20 2018. Sat in queue for 4ms. Completed in 0s. Show verbose information.