I use Certbot since 2017 without issues, but yesterday one of my new customers noticed a certificate error on my website https://www.thalasso-saintmalo.com.
Here is the screenshot he has taken (on Win10 Edge):
Error is DLG_DLAGS_INVALID_CA DLG_FLAGS_SEC_CERT_CN_INVALID
I can’t reproduce the error on any device. and the test https://www.ssllabs.com/ssltest/analyze.html?d=www.thalasso-saintmalo.com&hideResults=on gives an A+ grade.
After that I made him test other websites on his browser:
- reinemarine.com - also self hosted, gives same error
- cosmetique-thermesmarins.com - hosted on Kinsta, success
- letsencrypt.org - success
He said the error also appears on Chrome, Firefox, IE.
The “invalid CA/CN” error should be detected by the tests, and I don’t see any problem here.
What is going on? I don’t know where to start, any idea of the error?
Thank you very much
My domain is: thalasso-saintmalo.com
My web server is (include version): nginx/1.11.9
The operating system my web server runs on is (include version): Debian8
My hosting provider, if applicable, is: self hosted
I can login to a root shell on my machine (yes or no, or I don’t know): yes
I’m using a control panel to manage my site (no, or provide the name and version of the control panel): no
The version of my client is (e.g. output of
certbot --version or
certbot-auto --version if you’re using Certbot): 0.34.2