If this doesn’t match the current site you’re on, this is a problem.Īnother possible reason is that the TLS version running on the web server is old. Right-click anywhere on the website and click on “Inspect.” Then click on the security tab and click on “View certificate.” The issued domain will show in the certificate information.

The domain name alias is for a website whose name is different, but the alias was not included in the certificate.Īnother easy way to check the current domain name issue on the certificate is to open up Chrome DevTools on the site.The site uses a content delivery network (CDN) that doesn’t support SSL.The site no longer exists, yet the domain still points to the old IP address, where some other site is now hosted.The site does not use SSL, but shares an IP address with some other site that does.As SSL Labs states, a mismatch can be a number of things such as: As you can see from the SSL Labs test below, this is pretty quick and easy to diagnose. In this particular instance, the customer migrating to Kinsta had a certificate name mismatch which was throwing up the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. Check SSL certificate Check for Certificate Name Mismatch It could take a minute or two to scan your site’s SSL/TLS configuration on your web server. You can also select the option to hide public results if you prefer. It is very reliable and we use it for all Kinsta clients when verifying certificates. Simply input your domain into the Hostname field and click on “Submit.” Check Out Our Video Guide to Fixing SSL Errors If you see this error, the first and easiest place to start is to perform an SSL check on the certificate that is installed on the site. We recommend using the free SSL check tool from Qualys SSL Labs. The client and server don’t support a common SSL protocol version or cipher suiteĬheck out reasons below on why this happens and what you can do about it.

Error 113 (net::err_ssl_version_or_cipher_mismatch): unknown error.You might also see a variation of the error, such as:

Chrome is actually protecting you by not letting you load it. We were, of course, running the latest version of Chrome, so the issue was with their SSL certificate. In fact, we just recently encountered a user having this issue on their WordPress site who was migrating to Kinsta from another host. The ERR_SSL_VERSION_OR_CIPHER_MISMATCH error typically happens on older operating systems or browsers.īut that is not always the case. What Causes the ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error? If for some reason the browser doesn’t like what it sees, such as a misconfiguration or unsupported version, your browser might display the following error: “ERR_SSL_VERSION_OR_CIPHER_MISMATCH” which prevents you from accessing the site.Ĭheck out a few recommendations on how to fix this error. What Is the ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error?

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