7 Easy Fixes  For ERR_SSL_VERSION_OR_CIPHER_MISMATCH

One minute you’re visiting your site, the next you’re seeing: ERR_SSL_VERSION_OR_CIPHER_MISMATCH. Even worse, your customers and readers are also seeing the error. It’s like a person is standing in front of your business and yelling “Error!! Error!!” on a bullhorn. 

This frustrating WordPress error means your browser can’t establish a secure connection with the website you’re trying to access, effectively blocking you from viewing the content.

Fortunately, you can resolve this error with the right troubleshooting steps. In this guide, we’ll explain what causes the error and provide step-by-step solutions 

TL;DR: If you have already installed an SSL Certificate, the next step is to check that it’s valid.  Update your SSL/TLS configuration to support modern protocols and cipher suites on your server while ensuring your browser is also up-to-date.

Understanding the ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error

ERR_SSL_VERSION_OR_CIPHER_MISMATCH is an error that occurs in web browsers. It’s triggered when there’s an incompatibility in the connection between your browser and the website server. This error specifically indicates that your browser and the web server cannot agree on a common SSL/TLS protocol. It often means that your site is not secure and you have to fix it quickly. 

At its core, this error is caused by a mismatch in the cryptographic capabilities between client and server:

• Protocol version mismatch: Modern browsers typically support TLS 1.2 and TLS 1.3, while having disabled older versions like SSLv3, TLS 1.0, and TLS 1.1 due to security vulnerabilities. If a server only offers these older protocols, the connection will fail.
• Cipher Suite Incompatibility: Cipher suites are combinations of algorithms used for secure communications. If the browser and server cannot agree on at least one common cipher suite, the connection cannot be established.
• Handshake Failure: During the SSL/TLS handshake process, the client and server exchange information about which security protocols and cipher suites they support. This error occurs when this negotiation process fails to find common ground, preventing the secure connection from being established.

Fix the ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error

Encountering the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error can be frustrating, but there are several effective solutions to resolve it. The fix will depend on whether you’re a website visitor experiencing the error or a website owner whose visitors are reporting the problem. In either case,  you have to address the issue immediately. 

Step 1: Check expiry of SSL certificate

The first step in resolving the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error is to verify the validity of your SSL certificate. An expired SSL certificate is a common cause of this error, as browsers will refuse to establish a secure connection with sites using certificates that are no longer valid. You can easily check your certificate’s expiration date using SSL Labs Server Test, a powerful and free online tool maintained by Qualys.

SSL Labs Server Test provides an in-depth analysis of your website’s SSL/TLS configuration.

To use it, simply navigate to ssllabs.com/ssltest and enter your domain name into the search field. The tool will perform a comprehensive assessment that typically takes 2-3 minutes to complete. Once finished, it displays detailed information about your certificate, including its validity period, which clearly shows whether your certificate has expired or when it will expire.

Step 2: Update server SSL/TLS configuration

Outdated SSL/TLS configurations are among the most common causes of the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. Modern browsers have stopped supporting older protocols due to security vulnerabilities, so ensuring your server supports current standards is essential for maintaining compatibility. You’ll need to update your server’s configuration to support the latest SSL/TLS versions while disabling outdated ones.

A good web host will be able to help you out. 

Step 3: Enable compatible cipher suites

After sorting out your SSL certificate and updating your security protocols, it’s time to tackle the cipher suites. Think of cipher suites as different “languages” that your server and browsers use to talk securely. If they don’t speak at least one common language, you’ll get the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error.

Many websites run into problems because they’re still using outdated cipher suites that modern browsers refuse to accept. It’s like trying to communicate with someone who only speaks Latin—technically it’s a language, but nobody uses it for everyday conversation anymore.

You can reach out to your web host support and ask them to help out. 

Step 4: Renew or reinstall ssl certificate

An SSL certificate keeps your website secure. It makes sure that information sent between your site and visitors is private. Check if your SSL certificate is working and valid.

You can check your SSL certificate by clicking the padlock icon in your browser’s address bar. If you see a warning, your certificate may have expired or is not installed properly.

If your SSL certificate is expired, renew your SSL certificate with your hosting provider or SSL certificate issuer. You can also use a tool like Really Simple SSL as well. 

Step 5: Clear browser cache

Clearing your cache is important after reinstalling or renewing an SSL certificate. The cache stores old versions of your site’s data, including its SSL. This might cause errors like “Your connection is not secure” even if the SSL is working properly. By clearing the cache, you force the browser to load the updated certificate and settings.

Here’s how to clear the browser cache in Google Chrome:

1. Open Chrome.
2. Click the three-dot menu in the top-right corner.
3. Go to More tools > Clear browsing data.
4. In the window that appears, choose a time range (e.g., “All time” to clear everything).
5. Check the box for Cached images and files.

6. Click the Clear data button.
7. Once done, restart the browser and revisit your site to see the updated SSL certificate.

These steps are for Chrome, but they differ slightly on other browsers like Firefox or Safari. Look for similar options in your browser’s settings.

Step 6: Update web browser

Keeping your web browser updated is crucial for security. New browser updates include improved security protocols, bug fixes, and better compatibility with SSL certificates. An outdated browser may not recognize your SSL certificate correctly, even if it’s valid and installed properly.

Here’s how to update your browser in Google Chrome:

1. Open Chrome.
2. Click the three-dot menu in the top-right corner.
3. Go to Help > About Google Chrome.

4. Chrome will automatically check for updates. If an update is available, it will download and install.
5. After the update, click Relaunch to restart the browser and apply changes.

Always keep your browser updated. This ensures it supports the latest TLS (Transport Layer Security) versions used by SSL certificates.

The steps differ for other browsers. For example, in Firefox, you can update under the About Firefox section in the menu. Check the documentation for your specific browser to stay up to date.

Step 7: Check for redirect loops

Redirect loops happen when a URL keeps redirecting to itself or switches endlessly between a few pages. This can break your site and show errors like “too many redirects”. It may also prevent browsers from successfully loading your updated SSL certificate.

You can use an online tool like Redirect Checker or check your site’s URLs manually. Look out for issues like your site redirecting back and forth between HTTP and HTTPS or cycling endlessly between multiple URLs. Additionally, review your .htaccess file or your hosting platform’s redirect settings for any incorrect rules causing the loop. 

Once the redirect loop is resolved, browsers will be able to connect smoothly, and the error message should disappear.

If none of the steps resolve the issue, it’s time to reach out to your web host’s support team. Your hosting provider can help identify server-related problems, incorrect configurations, or SSL installation issues. Most hosts offer 24/7 support via chat, email, or tickets. Be sure to provide detailed information, such as error messages and the steps you’ve already tried. They can diagnose the issue and guide you toward a solution.

How to prevent the  ERR_SSL_VERSION_OR_CIPHER_MISMATCH error?

Fixing errors is one thing, but preventing them is even better. Taking some proactive steps can help you avoid SSL issues in the future. Regular maintenance, careful monitoring, and proper configuration are key. In this section, we’ll cover the best practices to keep your website running smoothly and secure, without running into SSL errors again.

1. Regularly update ssl certificates: Always monitor your SSL certificate’s expiry date and renew it before it runs out. An expired certificate will lead to security warnings for site visitors. Many hosting providers offer automated renewal options—use them to avoid missing renewal deadlines.You can also use an SSL monitor to keep track of your expiry dates and send you notifications. 
2. Adopt modern ssl/tls protocols: Your server should support the latest versions of TLS protocols, such as TLS 1.2 or TLS 1.3. These ensure better security and compatibility with modern browsers. Older versions, like TLS 1.0 or 1.1, are deprecated and can lead to vulnerabilities.
3. Maintain strong cipher suites: Configure your server to use strong, updated cipher suites. Remove any outdated or weak ones that could leave your site vulnerable to attacks. Check your server’s cipher suite settings with tools like SSL Labs.
4. Perform regular security audits: Regularly audit your server configurations and SSL setup. Audits help you identify potential issues, like deprecated settings or misconfigurations, before they cause errors.
5. Use reliable certificate authorities (CAs): Always get your SSL certificates from trusted certificate authorities. Reputable CAs provide better compatibility with browsers and ensure your site is recognized as secure.
6. Keep server software up-to-date: Outdated server software can lead to vulnerabilities and compatibility issues with SSL. Make it a habit to apply updates and patches as soon as they’re available.

Final thoughts

An SSL error isn’t just an inconvenience—it’s a direct threat to your site’s security and your visitors’ trust. A breach in security can expose sensitive data and harm your reputation. That’s why solving SSL issues as soon as they arise is crucial.

Proactive monitoring is essential to prevent future problems. Tools like MalCare help you stay ahead by monitoring your site’s security regularly, identifying vulnerabilities, and protecting against attacks. With consistent care and the right tools, you can ensure your site remains secure and error-free. Always prioritize your website’s security—it’s the foundation of a safe and trusted online presence.

FAQs

How to resolve err_ssl_version_or_cipher_mismatch error?

This error happens when the browser cannot establish a secure connection due to outdated SSL protocols or cipher suites. Here’s how to fix it:

1. Check your server settings to ensure it supports modern TLS protocols (like TLS 1.2 and TLS 1.3).
2. Update your server’s cipher suite configuration to use strong, secure options. Remove older, deprecated ciphers.
3. Ensure your SSL certificate is installed properly and is valid.
4. Clear your browser cache to refresh any saved SSL data.

How do I fix an unsupported protocol version?

This issue usually occurs when a website or server is using an older protocol version like TLS 1.0 or TLS 1.1, which most modern browsers have dropped support for. To fix it:

1. Update your server to enable TLS 1.2 or TLS 1.3 protocols.
2. Check your web hosting or server configuration for outdated protocols and disable them.
3. If you’re a user, make sure your browser is updated to the latest version for full compatibility.

How do I fix an ssl protocol error in chrome?

An SSL protocol error in Chrome can have multiple causes. To resolve it:

1. Make sure your site’s SSL certificate is valid and properly configured.
2. Clear your browser cache by going to Settings > Privacy and Security > Clear Browsing Data and removing cached files.
3. Update Chrome to the latest version.
4. Disable conflicting extensions by going to Settings > Extensions and disabling them one by one to identify the problem.
5. Check for incorrect redirections between HTTP and HTTPS that might cause a conflict.

How to fix error 113 (net::err_ssl_version_or_cipher_mismatch): unknown error?

This is a server-specific issue caused by outdated protocols or weak ciphers. To fix it:

1. Enable support for up-to-date TLS versions (TLS 1.2, TLS 1.3) on your server.
2. Configure your server to only use strong, secure cipher suites and remove deprecated ones.
3. Double-check your SSL certificate installation to make sure it’s correct and not expired.
4. Run your site through diagnostic tools like SSL Labs to identify the exact issue and fix it accordingly.