Today, I can’t access any of them on Chrome.
Can you access them in any other browser(s)?
There are different error messages but most say that the site is insecure because the certificate is invalid.
The SSL certificates for the sites have expired.
If you installed the certificates yourself, you need to go through the same process to acquire and install new certificates.
If they came with your hosting, please check your hosting control panel to see if you’ll find any feature related to SSL certificates renewal, or contact your host for help.
If you can share any of the sites with us, I could check the currently installed certificate and let you know where it came from.
Good luck!
Thank you for your response:
On Safari I get warnings also
The SSL Certificates were created with the plugin SSL Zen. They are all current.
Here is one site: vientozinenadvies.nl
The site vientozinenadvies.nl works fine from my end, as shown below.
And it has a valid LetsEncrupt SSL certificate issued on 16th August and expiring 14th November (most likely the plugin will automatically renew it).
Can you post a full-page screenshot of one of these error messages you’re seeing? You can upload your screenshot to https://snipboard.io and ahare the link here.
I do a manual renewal.
So does that mean that the problem is with my computer?
I tried it on my iPad. I got a warning there too. It said that the certificate had expired 2 days ago. Strange.
That screenshot was from Chrome on my Macbook.
Here is another part of the warning I got from Chrome:
https://snipboard.io/81LfdW.jpg
This warning mentions Avast which is my anti-virus program.
@engine44
What browser/client equipment do you use?
A known problem these last couple of days is that one of the root certificates that Let’s encrypt has been using recently expired. (DST Root CA X3). If you’re on a browser that wasn’t updated for some time, you might be experiencing some trouble right now.
@gappiah Great contributions from you. Did you know that tens of thousands of WordPress contributors communicate via the chat application Slack. In our Slack, we’ve also got a channel were we talk about the support forums and run a chat meeting once a week (on Thursdays). We don’t provide support there, but it’s a useful place for getting help when you’re stuck, for instance. You can invite yourself via https://make.wordpress.org/chat/
I use Chrome on my Macbook. I think Chrome updated their browser a couple of days ago.
