You can face ERR_SSL_VERSION_OR_CIPHER_MISMATCH error either you are the website owner or the user. If you are the user, most probably you don’t need to worry about it as the problem is from the other side. You see this error because your browser has detected that the website you are visiting does not have a valid SSL certificate.

In this article, you will get to know how to solve this the easy way.


Whenever a person gets this particular error message while attempting to log onto the website of yours, it implies that the server of yours and also the visitor’s browser (client) are powerless to build a secure, encrypted connection as a result of an unsupported protocol. There are a few likely reasons for this, though it is usually since the SSL certificate of yours is misconfigured.

The thing that the majority of security gurus are attempting to drill into the collective consciousness of netizens is that “secure” does not imply “safe.” The term on the road is the fact that over one-half of the very tech-savvy cybercriminals have changed to HTTPS, and also the eco-friendly padlock with secure written almost all over it might be incredibly misleading. The padlock denotes the communication channel between your client’s browser and the web server of yours is going to be encrypted. Whether the server is legit, or maybe you are getting coaxed into heading over to some phishing site is a thing that cannot be driven by using an environmentally friendly padlock (unless the net server comes with an EV SSL certificate). Thus, you may not be secure at all.

Together with the typical online user probably at the edge of their seat of theirs as a result of increasing data breaches and also cybersecurity threats, it’s not a glorious time whenever they visit the website of yours and also encounter an SSL error message. It is of the utmost importance to fix these mistakes to stay away from any adverse effect on business and also to remember your customer’s trust.

Why does the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error occur?


The ERR_SSL_VERSION_OR_CIPHER_MISMATCH error generally happens on older operating browsers or systems. But that’s not necessarily the truth. We just lately come across a person getting this particular matter all over their WordPress website that was migrating to Kinsta from yet another host. We had been, of course, running the most recent version of Chrome. Therefore the problem was with the SSL certificate of theirs. Chrome is protecting you by not allowing you to load it.

You may additionally view a variation of the errors, such as

  • Error 113 (net::err_ssl_version_or_cipher_mismatch): unknown error
  • The server and client do not support a typical SSL protocol version or even cipher suite


There are a few solutions for this error. Just follow the following solutions one by one.

1. Check SSL Certificate for Your Site

In case you observe the error, the easiest and first area to begin is performing an SSL check on the certification that is placed on the website. We suggest making use of the free SSL check application from Qualys SSL Labs. It’s extremely dependable, and we put it to use for those Kinsta clients when verifying certificates. Just input the domain name of yours into the Hostname field and click on “Submit.”

You can additionally choose the choice to hide public results in case you prefer. It might have a second or perhaps 2 to scan your site’s SSL/TLS configuration on the web server of yours.

SSL Labs is the best solution to check for SSL.

Qualys Certificate Test
Qualys Certificate Test

If this test is clear, the next thing that you need to see is the SSL name mismatch

2. SSL Name Mismatch

Qualys Certificate Server Certificates
Qualys Certificate Server Certificates

On the Qualys SSL Checker, this particular message is going to show up in case the device can recoup a certificate for the website. Still, in case the domain names listed on the certificate don’t match your queried domain. Based on the Qualys article, a mismatch might occur because of the following scenarios:

  • The website shares an IP address with a few other sites which use SSL.
  • The site doesn’t exist.
  • The domain points to the old IP address that hosts various other websites.
  • The website works on a content delivery network (CDN) that does not support SSL.
  • The domain name alias wasn’t incorporated in the certificate.

You can additionally view the certificate info to see in case it matches with the present site you are on.

3. See if the website is using an old TLS/SSL

The TLS model on the web server ought to be 1.2 or even higher (preferably TLS 1.3). On the Qualys SSL Checker application under the configuration tab, you can view the present version of TLS operating on the server. For earlier versions, you can reach out with the host and get them to upgrade the TLS version of theirs.

4. Update your OS system, if it needs to be

The most recent SSL certificates aren’t agreeable with outdated operating systems (OS). Browsers likewise withdraw support for new technologies on old operating systems. For example, Chrome withdrew support for Windows XP in 2015.

5. Determine In case the website is Running an Outdated RC4 Cipher Suite

The present cipher collection could be seen on the Qualys SSL Checker tool. Make sure that the server configuration is enabled by using an alternative cipher suite than RC4. Not merely is RC4 not pseudo-random in the development of the keystream and contains keystream biases, but additionally, the first key scheduling algorithm is very vulnerable.

Chrome removed support for RC4 Cipher Suites from version forty-eight & upwards. Google and Mozilla’s deprecation of RC4 cipher collection is the leading cause of this particular error. In the situation of big enterprise deployments that use RC4, they may be reluctant to change the configurations of theirs because it will take much longer to process and implement changes in an intricate planet.

6. Clear SSL State on your computer

Much like clearing browser cache, clearing the SSL state manages every synchronization issue. On Chrome:

Clear SSL State
Clear SSL State

In the Internet Properties window, go towards the Content tab and click Clear SSL State. Click OK and restart the internet browser of yours.

7. Temporarily Disable The Antivirus of yours

Some antiviruses obtain the certificates of theirs in the mix and create confusion by including a layer in between the server as well as the internet browser. In case not any of the above-mentioned fixes work, as a last measure, owners can experiment with disabling the antivirus temporarily. This can occasionally repair the problem. Nevertheless, we do not recommend this action since it leaves you susceptible to cyberattacks. In case you opt to conduct this phase, proceed with extreme caution.

8. Examine Whether the site Can be Available Over HTTP

Try to attain the site over HTTP rather than using HTTPS. In case you do not receive the same error, the problem has to be fixed on the server end.

9. Enable All SSL/TLS Versions

  • On Chrome, wide-open Settings, and hunt for proxy options in the search area.
  • Full open Proxy Settings and in the Internet Properties window click the Advanced tab.
  • Allow all of the versions of SSL/TLS.
Enable SSL/ TLS
Enable SSL/ TLS

10. Turn off QUIC

On the Chrome web browser, visit Chrome://flags, and also hunt for “experimental QUIC protocol” in the search area. In case enabled, disable this particular setting and restart the internet browser. Firefox doesn’t but support QUIC.



So these are the 10 possible solutions for ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. Please let us know if these solutions work for you.

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