You’re about to score tickets to the concert of the year. The countdown timer is ticking. You’re just a click away. Then, bam! Your screen flashes with “ERR_SSL_VERSION_OR_CIPHER_MISMATCH.” Frustrating, right?

This digital hiccup is the virtual equivalent of being cut in line. It’s that pesky SSL error telling you your browser and the website’s server can’t create a secure, encrypted handshake. And while it might sound like rocket science, I’m here to unravel this web security enigma for you.

By the end of our chat, you’ll not only grasp why this error crashes your browsing party but also how to show it the door. We’ll decode the mysteries of SSL/TLS protocols and cipher suites, and without any technical jargon—I promise. Dive deep into the nerve center of browser compatibility and encryption algorithms, and wave goodbye to those web server SSL settings woes.

Ready to conquer the cryptography chaos and get back to stress-free web surfing? Let’s shuffle through this cyber puzzle together.


There are numerous reasons why this site can’t provide a secure connection. Here are some of the common causes:

  • Poor Internet Connection
  • Browser Cache and Cookies are not cleared
  • Needless Add-ons or Extensions are installed in the browser
  • Website blocked in Firewall
  • The website is blocked or trashed in the antivirus program

Simple Fixes

When the ERR_SSL_VERSION_OR_CIPHER_MISMATCH Chrome error occurs, you can try these simple fixes to fix it:

Check your internet connection

This error is sometimes triggered simply due to a poor internet connection. Check your internet connection to ensure everything is working properly on that front and contact your Internet Service Provider if you need help, together with the provider it is important to find out what is good internet speed for you so that you do not face such a problem in the future.

Check the SSL certificate

One of the first things you should do when the client and server don’t support a common SSL protocol version or cipher suite is checking the SSL certificate.

You can Chrome view certificate and perform its deep analysis with the help of certain online free tools. We recommend you to use the one provided by Qualys SSL Labs.

Delete Browser Cache and Cookies

Whenever you experience an internet error, one of the first things you should do is deleting browser cache and cookies as they often cause all kinds of errors.

This step might differ depending on the web browser of your choice. If you have never done this before and aren’t sure how to go about it, search Google for the steps necessary to clear the stored data on your preferred browser.

In some cases, using the keyboard shortcut CTRL + SHIFT + DELETE will grant you access to the clear browsing data page. Delete the cache and cookies and try to access the website to check if this fixed the problem.

Clear the SSL State 

One of the things you should also try doing if you cannot establish a secure connection Chrome is clearing the SSL state. To clear the SSL state in Chrome on Windows, follow these steps:

  1. Click the Google Chrome – Settings icon (Settings) icon, and then click Settings.
  2. Click Show advanced settings.
  3. Under Network, click Change proxy settings. The Internet Properties dialog box appears.
  4. Click the Content tab.
  5. Click Clear SSL state and click OK.
  6. Restart Chrome.

Check RC4 Cipher Suite

The removal of RC4 cipher suite in Chrome version 48 can sometimes cause the SSL version interference and the ERR_SSL_VERSION_OR_CIPHER_MISMATCH. Do a simple Chrome version check and disable the RC4. In other words, make sure the server configuration is enabled with a different cipher suite.

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Check for Certificate Name Mismatch

This doesn’t happen often, but there were some cases reported of a certificate name mismatch causing the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. Luckily, this is very easy and quick to diagnose and fix.

A mismatch can be a number of things such as:

  • The site does not use SSL, but shares an IP address with some other site that does.
  • The site no longer exists, yet the domain still points to the old IP address, where some other site is now hosted.
  • The site uses a content delivery network (CDN) that doesn’t support SSL.
  • The domain name alias is for a website whose name is different, but the alias was not included in the certificate.
  • Browser compatibility issues causing SSL/TLS handshake failures.

Remove Unnecessary Add-ons and Extensions


Some add-ons and/or extension can cause this error to happen so try to identify the ones that cause the problem and remove them.

Whitelist Website in Firewall and Antivirus Software

Chrome ERR_SSL_VERSION_OR_CIPHER_MISMATCH can also occur if the website you are trying to access is blacklisted in your antivirus program and/or firewall. You can easily fix this by whitelisting the website of your choice.

Enable TLS 1.3

This error can sometimes be fixed in Chrome by enabling TLS 1.3. Here is how you can do that:

  • In URL type, chrome://flags
  • Search for TLS 1.3
  • If it is enabled (or default), then keep it as it is and close the window.
  • If it is not enabled, then hit the enable button.

Enable All SSL/TLS Versions

Note: This step includes enabling older, insecure protocols. You are doing this at your own risk.

  1. Open Chrome
  2. Click on the three dots you see in the top-right corner
  3. Now go to Settings and search for ‘proxy’ in the search field
  4. You should see the Open proxy settings option, click on it
  5. Go to the Advanced tab
  6. Now mark all SSL & TLS versions
  7. Hit the Apply button
  8. Restart Chrome

Disable QUIC protocol

If the QUIC Protocol is enabled, the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error can occur in Chrome. To fix it, you have to disable the QUIC protocol. Here is how you can do that:

  • In URL type, chrome://flags
  • Search for Experimental QUIC protocol
  • If it is disabled (or default), then keep it as it is and close the window.
  • If it is not disabled then disable it.

Disable the Anti-Virus Software


There is a chance that your anti-virus program is blocking your access to the website. To check if this is the case, simply disable your anti-virus program and try to access the website again. If that fixed the issue, you know what the problem is.

If you aren’t able to access the website with the disabled anti-virus program, check your firewall too to ensure the website isn’t blacklisted.



This nasty error pops up when your browser and the site’s server have a squabble over speaking the same secure language. Think of it as if you’re trying to tune into your favorite radio station but you’re just getting static—that’s your browser struggling with encryption algorithms or outdated SSL/TLS protocols.


Cool your jets, it’s typically an easy fix. Start by giving your browser a refresh; sometimes it’s just a hiccup. If that won’t cut it, updating your browser often works wonders as it syncs up with the latest security standards and those cipher suites the error is fussing about.

Can outdated browsers cause this SSL error?

Absolutely, like playing an old cassette in a digital world—it doesn’t fit. Modern web servers and those SSL certificates need up-to-date browsers. If yours is gathering dust, it’ll trip over the server’s encryption methods, so make sure you’re not snoozing on those updates.

Is this error a sign of something malicious?

Jumping to conclusions of dark cyber deeds? Hold up. While it can trigger alarms about web security, it’s usually more benign—a misconfiguration or something off in the SSL/TLS certificate installation. Don’t sweat it too much, but staying vigilant online is always a top-tier move.

What role do cipher suites play in this error?

Cipher suites are the VIPs in the secure connection shindig. They set the stage for how your browser and a server whisper sweet nothings—or, you know, data—securely. An outdated or unsupported cipher suite is like a misplaced puzzle piece, it just won’t fit, causing the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error.

Do I need to contact my website hosting provider about it?

If you’re running a website and it’s throwing this SSL tantrum at visitors, get on the horn with your hosting provider ASAP. It could be an SSL configuration misstep on their end, and they have the backstage pass to the server settings and SSL certificate tweaks.

Why would the error occur after renewing an SSL certificate?

Renewing’s meant to be a good thing, right? But if it’s not done to a T, the result’s as off-key as a karaoke night gone wrong. Maybe the SSL/TLS certificate‘s chain got messed up, or an intermediate certificate was left out. Double-check the renewal process, it should clear up the hiccup.

Could browser extensions or antivirus programs cause these SSL errors?

Yes, and it’s unintentionally ironic. Your digital guards, the antivirus programs, or some overly zealous browser extensions may scrap the SSL convo. They might misinterpret secure encryption methods or mishandle mixed content. Temporarily disable them and see if your secure browsing gets back on track.

Can network issues trigger ERR_SSL_VERSION_OR_CIPHER_MISMATCH?

You got it. A skittish network or restrictive settings might as well put duct tape over your browser’s mouth. It messes with the SSL handshake needed to firmly establish that encrypted connection. A look-over of your network settings for any overbearing SSL inspections or restrictions wouldn’t go amiss.

Is the ERR_SSL_VERSION_OR_CIPHER_MISMATCH specific to just one browser?

Nah, this tantrum is browser-agnostic. But, each browser has its own way of handling SSL protocols and cipher suites—like siblings interpreting a “quiet game” differently. If the error’s pestering you in one browser, check others. It’ll clue you in if it’s a universal snafu or one browser being finicky.


So, we’ve talked about the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. By now, it’s clear—this isn’t just tech babble; it’s a secret handshake gone wrong between your browser and the website you’re trying to visit.

  • Trust that encryption algorithms are the unsung heroes here, they keep your data tucked away safely.
  • Remember, an up-to-date browser does wonders; it’s like getting a front-row ticket to flawless, secure internet access.
  • SSL certificates? Keep ’em in check. They’re the gatekeepers to a smooth-sailing web expedition.

You’ve come a long way, from staring at that error to becoming a bit of a maestro at deciphering it. Next time it tries to crash your browser party, just nod knowingly. You’ve got the tools to tune it out and keep the good times rolling. Embrace the secure side of the web—it’s a wide-open digital playground when you speak its language.

If you enjoyed reading this article on how to fix ERR_SSL_VERSION_OR_CIPHER_MISMATCH, you should check out this one about how to fix the WordPress white screen of death.

We also wrote about a few related subjects like fixing the 502 bad gateway error, how to fix WordPress not sending email, how to fix the too many redirects error, fixing WordPress the HTTP error when uploading image and how to fix the 504 error. There’s also this article on fixing the “sorry, you are not allowed to access this page” error, yet that isn’t written by us.

Milan Jovanovic
Milan Jovanovic

Product Lead

Articles: 219