Encountering the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error can be frustrating for users attempting to access secure websites. This error indicates a failure in establishing a secure connection between the browser and the server due to a mismatch in SSL/TLS protocols or cipher suites.

Understanding the meaning of this error, its potential causes, and effective solutions is crucial for resolving it promptly and ensuring secure browsing experiences.

In this comprehensive guide, we’ll delve into the meaning of ERR_SSL_VERSION_OR_CIPHER_MISMATCH, explore its underlying causes, and provide easy-to-follow methods to fix this error.



ERR_SSL_VERSION_OR_CIPHER_MISMATCH is a common SSL/TLS-related error encountered by users when attempting to establish a secure connection with a website. It typically appears as a warning message in web browsers such as Google Chrome, Mozilla Firefox, or Microsoft Edge.

The error message indicates that the SSL/TLS handshake between the browser and the server failed due to a mismatch in supported SSL/TLS versions or cipher suites.

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Several factors can contribute to the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error:

  1. Unsupported SSL/TLS Protocol Version: The browser and the server may not support compatible SSL/TLS protocol versions, leading to a handshake failure.
  2. Mismatched Cipher Suites: The browser and the server may not support compatible cipher suites for encryption and decryption during the SSL/TLS handshake.
  3. Outdated Browser or Server Software: Using outdated browser versions or server software that lacks support for modern SSL/TLS protocols and cipher suites can trigger this error.
  4. Server Configuration Issues: Misconfigured server settings, including incorrect SSL/TLS certificate installation or cipher suite configuration, can cause handshake failures.
  5. Firewall or Antivirus Interference: Overzealous firewall or antivirus software may interfere with SSL/TLS connections, resulting in handshake failures and the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error.


SSL certificates verify that the website is adhering to necessary standards in order to keep your connection secure and your personal information secret. As a result, Chrome displays an error message when it suspects a website is not adhering to its security policies.

Because it is a requirement of chrome, there isn’t much you can do about it.

1. Change The Chrome Flags

You can suppress Chrome’s warnings for SSL versions that are out of date by changing the settings. This approach is only applicable to older versions of Chrome, as it has been removed from the most recent versions of the browser.

Step 1: Go to chrome flags in order to alter Google Chrome flags. Once you’ve found the minimum SSL/TLS version supported, proceed to step two. It’s there.

Step 2: After clicking the SSL/TLS option, a menu will appear on your computer’s screen. Select SSLV3 from the drop-down menu.

Step 3: Finally, click on the Relaunch option at the bottom of your screen to restart the programme.

You should now be able to view the previously blocked website thanks to the removal of Chrome’s restrictions.

 2. Disable The SSL Scanner’s Scan

Has your computer or mobile device been equipped with anti-virus software? If this is the case, then it is possible that they are the source of the issue. However, you need not be concerned; you may disable or turn them off at any time using the options menu.

This will remove the problem and assist you go through it, so don’t worry about it.

Step 1: Locate and open the Bit Defender icon on your device’s icon tray. The next step is to select modules. If you haven’t already done so, click on the option labelled “web protection” in order to activate it.

Step 2: Remove or disable the option to scan SSL. Now, return to the webpage and see whether you can access it.

 3. Try Out Older Versions

However, the browser is normally up to date with the most recent certificates and protocols. This could be the reason why your browser won’t let you use any SSL certificates that are more than a year old.

Even though I indicated in Step 1 that the option for changing Chrome flags is available only in previous versions and not in an updated version, you can try downloading an older version of Chrome to see if that helps you.

It’s important to remember that you can only run two instances of Google Chrome at the same time if you use the portable version, so be sure to uninstall the old one before installing the new one. Alternatively, you can utilise sandboxing to run two versions of Google Chrome at the same time.

Some Eas And Short Solutions to Fix ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error Easily:

Method 1: Verify SSL/TLS Protocol Compatibility

  1. Check Browser Settings: Ensure that your web browser is up to date and supports modern SSL/TLS protocols. Update your browser to the latest version if necessary.
  2. Check Server Configuration: Contact the website administrator or hosting provider to verify that the server supports compatible SSL/TLS protocol versions.

Method 2: Adjust Cipher Suite Configuration

  1. Browser Configuration: In some cases, adjusting the browser’s cipher suite settings may resolve the error. Refer to your browser’s documentation or support resources for instructions on modifying cipher suite settings.
  2. Server Configuration: If you manage the server, review and update the server’s cipher suite configuration to ensure compatibility with modern browsers. Consult the server software documentation for guidance on configuring cipher suites.

Method 3: Update Browser and Server Software

  1. Browser Update: Ensure that your web browser is updated to the latest version available. Browser updates often include enhancements to SSL/TLS protocol support and security features.
  2. Server Software Update: If you manage the server, update the server software to the latest version, ensuring compatibility with modern SSL/TLS protocols and cipher suites.

Method 4: Disable Firewall or Antivirus Software Temporarily

  1. Firewall: Temporarily disable the firewall or adjust its settings to allow SSL/TLS connections. Ensure that any firewall rules or security settings do not interfere with SSL/TLS handshake processes.
  2. Antivirus: Temporarily disable antivirus software or add exceptions for SSL/TLS connections to prevent interference with secure browsing activities.

Method 5: Contact Website Administrator

If you encounter the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error on a specific website, contact the website administrator or support team for assistance. They may be able to resolve server-side issues or provide guidance on troubleshooting steps.

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Encountering the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error can disrupt secure browsing activities, but with the right troubleshooting methods, it can usually be resolved effectively. By understanding the potential causes and following the step-by-step solutions outlined in this guide, users can address this error and restore secure connections with websites.

Whether it’s verifying SSL/TLS protocol compatibility, adjusting cipher suite configurations, or updating browser and server software, taking proactive steps to fix the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error ensures a smoother browsing experience and enhanced security.

With these easy-to-follow methods at their disposal, users can overcome the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error and enjoy secure browsing experiences without interruptions.