Windows XP can't access https Wordpress site

I just installed Let’s Encrypt free SSL for my Wordpress blog, everything is fine except site unable access from Windows XP, I’ve tested with both Firefox and Chrome latest version.

The error is:

Your connection is not secure

The owner of <site> has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.

There is no problem when visit the site from Windows 7,8 or 10. It is also working well from Ubuntu

I think this is the issues made by Windows XP or Let’s encrypt problem. But few hours to research, ask everywhere and I unable to solve this error

Do you have any experience with Let’s encrypt or known how to fix it? I don’t want lost many traffic from Windows XP users


What happens when you connect to is using the built-in version of IE that comes with XP? Reading your description though, it does sound as if the plug-in you’ve used isn’t configured correctly - Firefox and Chrome are just reacting to that it would seem. Perhaps an email to the team that produced ‘Let’s Encrypt’ would be a better option.

This might be of some help:

Could be an SNI problem.

But I think the moral of the story is: Windows XP is end-of-life. Don’t expect end-of-life software to work.

There is that too it. I doubt you’re losing much traffic catering for FF/Chrome on XP. You can gain more traffic by reworking the site to meet RWD needs.

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