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Your browser might display the “ERR_SSL_VERSION_OR_CIPHER_MISMATCH” error and prevent you from accessing the website if it finds something wrong, such as an unsupported version or misconfiguration.

Look at the detailed information and some suggestions for resolving this issue.


Web browsers automatically verify that the website is SSL-certified whenever you intend to connect to a website. This is verifying that the website you are accessing is authentic and has put the proper security methods in place to protect your connection.

A TLS handshake is the name given to this procedure. The technology known as TLS (Transport Layer Security) makes sure that a user’s system and a web server communicate securely.

During the TLS handshake, neither the web server nor the user’s browser supports a standard version of the SSL protocol. In that scenario, the browser will automatically show the error notice.

Why does the SSL_CIPHER_MISMATCH Error occur?

The browser uses the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error message to prevent you from visiting dangerous websites. Furthermore, a website can use an outdated version of a security-vulnerable protocol, which could damage your device or the data it receives.

Error messages are displayed when a web server or web browser cannot handle a standard SSL protocol due to several possible reasons.

Improper SSL Declarations

If the SSL certificate for the domain is given to an alternate domain name alias then a certificate mismatch issue may occur.

Antivirus Software

An incorrect software configuration might cause a false alarm that leads to the ERR_SSL_VERSION_OR_CIPHER_MISMATCH issue.

Outdated Operating Systems and Web Browsers

The most recent version of TLS may not be supported by older web browsers or operating systems.

Cache of a Web Browser

The website’s security upgrade might not be reflected in the cached data.

Older TLS versions

The web server could use an outdated TLS version that is incompatible with modern web browsers.

It is significant that the mistake exclusively arises on websites that protect access and information exchange using HTTPS encryption and SSL certificates. A lock icon is in the URL bar for websites that use these encryptions.

Explore the causes of this as well as the solutions below.


Verify your SSL Certificate

Conducting an SSL check on the installed certificate on the website is the most straightforward step when seeing this issue. We suggest using the free Certera SSL checker tool. Because of its excellent dependability, we validate certificates for every client using it.

Click “Submit” after entering your domain name in the Hostname field. Alternatively, you may choose to keep the recommendations private. A review of the SSL/TLS settings for your website on your web server can take a minute or two.

Check if the Certificate Name Matches

An SSL certificate verifies your website’s identity. The name on the certificate and the website’s name should match. The certificate must also originate from a reliable source.

The error may occur for a few different reasons why the names do not match.

When another domain with the same IP address utilizes SSL but the current domain does not.

The domain is pointing to a nonexistent IP address. The previous website has been superseded. However, its IP address is still used by another website.

The content delivery network (CDN) that the website utilizes does not support SSL.

The domain name alias for the website is not included in the certificate.

After you identify the issue’s root cause, fixing it will be simple.

Look out for Older Versions of TLS

Another cause might be that the web server’s TLS version needs to be updated. It should ideally operate on TLS 1.2 or, better yet, TLS 1.3. As a customer, you do not need to worry, and we constantly update our servers to the newest and best-supported versions. Recommended reading: You may address ERR_SSL_OBSOLETE_VERSION Notifications in Chrome if you are utilizing older TLS versions.

The SSL Labs tool can assist with this as well. The version of TLS currently in use on the server with that certificate will be displayed to you under configuration.

Modify the Security Settings of Your Browser

An SSL problem may also be caused by changes you’ve made to your browser’s settings to improve your online experience. To alter them, take the actions listed below:

  • In the browser’s address box you are using, type chrome://flags 
  • Press the CTRL+F keyboard shortcut to see the Find bar. Type “Minimum SSL/TLS” into the bar and press Enter. You will be taken straight to that choice by doing this.
  • Select SSLv3 from the drop-down menu that appears now.
  • Try loading the website once again after restarting your browser.

Examine the Security Certificate Manually

To independently verify your SSL certificate, launch your webpage in a browser, then do the following actions:

Follow the steps for Firefox:

  • Right-click anywhere on the webpage.
  • Click View Page Info.
  • Select the Security tab.
  • Click View Certificate.

Follow the steps for Chrome:

  • On the page, you may right-click anywhere.
  • Select Inspect.
  • To see further options, click the arrows >> in the Inspection window towards the top.
  • Select Security.
  • Click and Check the Certificate

Follow the steps for Safari:

  • Double-click the upper-right section’s padlock symbol.
  • Click Show Cert > Details in the resulting window.

The option to view the certificate will not be available if the website you are verifying is not secure and does not have one.

Turn Off your Antivirus for a while

The last thing you want to undertake if you’ve exhausted all other options and the ERR_SSL_VERSION_OR_CIPHER_MISMATCH problem persists is immediately turning off your antivirus software. Certain antiviral apps try to get in the way of your web browser and the internet. This layer uses a different set of certificates for operation, which might occasionally cause issues.

Remember that this is only for analyzing and testing; when you’re determined, turn on your antivirus software. If the ERR_SSL_VERSION_OR_CIPHER_MISMATCH problem was resolved by doing this, consider switching to antivirus software that supports SSL.

Reinstall the Web Browser

Even if the previous step is failed and the issue continues, the final trail you should do is to reinstall your browser. However, before you do that, try accessing the page on your computer using a different browser. For that, even Internet Explorer works well! If the website opens in other browsers, you should install an alternative one.

Wrap up!

When a typical SSL protocol version is not supported by both the web server and the web browser, an error known as ERR_SSL_VERSION_OR_CIPHER_MISMATCH occurs, thankfully, ERR_SSL_VERSION_OR_CIPHER_MISMATCH may be fixed in a few different ways.

Verify your SSL/TLS certificate to reveal challenges like SSL certificate name mismatches and the SSL/TLS version currently in use. Furthermore, see if the domain still resolves to an outdated IP address.

Lastly, if you come across an error notice like ERR_SSL_VERSION_OR_CIPHER_MISMATCH, don’t panic. Carefully read the message to determine the best course of action. The mistake may recur if it is not fixed correctly.




  • Verify the TLS/SSL certificate.
  • Set up SSL using Cloudflare.
  • Turn on TLS 1.3 Support.
  • Turn off the QUIC Protocol.
  • Get Rid of Your Web History and Cache.
  • Turn Off Your Firewall or Antivirus.

How can I resolve an SSL protocol that isn’t supported?

Below are seven useful ways to resolve an SSL protocol that isn’t supported.

  • Remove the Cache and SSL State of Your Browser.
  • Verify Your System’s Clock.
  • Turn off third-party browser add-ons and antivirus programs.
  • Verify the SSL certificate you have.
  • Turn off the QUIC protocol. Turn on every SSL/TLS version.
  • Modify the Level of Privacy and Security on the Internet.

How do I erase Chrome’s SSL cache?

To clear the SSL status on Windows Chrome, take the following actions:

  • After selecting the Google Chrome – Settings (Settings) icon, select Settings.
  • To view the advanced settings, click Show.
  • Click Change proxy settings under Network.
  • Select the Content tab.
  • After selecting “Clear SSL state,” click OK.
  • Restart Chrome.

How is an SSL certificate installed?

Click Manage SSL Sites under Install and Manage SSL for your site (HTTPS). Click Browse Certificates after swiping down to the Install an SSL Website section. Click Use Certificate after selecting the certificate you wish to activate. The certificate’s fields will then be automatically filled in.

How can I modify Chrome’s SSL settings?

With the Chrome browser, go to [Settings] -> [Show Advanced Settings] -> [Change Proxy Settings] -> [Advanced] to configure SSL/TLS settings. To access the Security options, scroll down. To View the Entire Image, Click. Best Practice: Compare the browser settings of a working computer with the conflicting one and perform the necessary changes.

Where to obtain authentic SSL Certificates?

Now, you can obtain authentic and trusted SSL certificates from CheapSSLWeb and take advantage of our unbeatable prices, 24/7 reliable service, SSL resources, and user-friendly CSR Generation tool. Join the countless satisfied customers who have made us their trusted SSL certificate provider.

Janki Mehta

Janki Mehta

Janki Mehta is a Cyber-Security Enthusiast who constantly updates herself with new advancements in the Web/Cyber Security niche. Along with theoretical knowledge, she also implements her practical expertise in day-to-day tasks and helps others to protect themselves from threats.

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