To connect to a website, the browser accesses first its SSL certificate. Secure Sockets Layer (SSL) certificates are proof of each website that it is legit and genuine. The SSL certificates also verify that the website is safe for users’ connections.

However, when the browser sees that it is unsafe, it shows the error message, “ERR_SSL_VERSION_OR_CIPHER_MISMATCH.” It may be frustrating to see an error instead of loading the website, but it is also one way to ensure that what you are about to enter must be safe. The error message indicates that the website is unsafe, hence it is blocked by the browser.


If you see the error message on your Google Chrome browser, don’t worry! The issue may seem complicated, but there are ways on how you can fix it. Check out the solutions below.

How to Fix Error ERR_SSL_VERSION_OR_CIPHER_MISMATCH on Google Chrome Browser

Method #1 – Assess the SSL Certificate

You can verify it if there is something wrong with the website’s SSL certificate. To do this, you need to use an SSL check tool. You can see online that there are free tools that you can use. To check the SSL certificate, input the name of the website. It will show the certificate for you to assess and verify the authenticity.

Method #2 – Clear the SSL State on Google Chrome

Clearing the SSL State on Chrome can help delete corrupted temporary files that are causing the error in your browser.

  1. Launch your Google Chrome browser.
  2. Click the Menu icon.
  3. Select Settings.
  4. Click Show advanced settings or enter chrome://settings/ on your address bar.
  5. Look for Network, and click “Open your computer’s proxy settings”.
  6. A new Internet Properties window will appear. Navigate to the Content tab.
  7. Look for the Certificates section, and click Clear SSL state.
  8. Click OK.
  9. Restart your Chrome browser.

Method #3 – Disable the HTTPS Scan on Your Antivirus

Credit: Krisikorn/Freepik

Before you disable the HTTPS scan, you need to verify first if it is your antivirus that is causing the error.

  1. First, disable your antivirus.
  2. Now, load the website again on your Chrome browser. If it loads without a problem, the issue is with your antivirus. If not, try to do the other solutions.
  3. If your antivirus is causing the error, launch your antivirus.
  4. In the Settings, look for the HTTPS Scan. Disable the option.
  5. Turn on your antivirus and load the website again.

Method #4 – Disable Experimental QUIC Protocol on Chrome

Credit: Windows Dispatch
  1. On Google Chrome’s address bar, type chrome://flags.
  2. On the Settings page, look for the Experimental QUIC protocol section.
  3. Click the drop-down arrow, and select Disabled.
  4. Restart your Chrome browser.

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