In this article, learn how to fix error code Err_SSL_Protocol_Error when you attempt to access a website on Chrome browser. Basically, this error is due to requiring a client authentication certificate that might not be available or a problem with the server or other several reasons.

Let me explain why does SSL connection error Err_SSL_Protocol_Error occur on Google Chrome browser?
To help users to browse securely and safely in Google Chrome, Chrome requires websites need to use trustworthy SSL (Secure Sockets Layer) certificates from trusted organizations. Hence, if the website doesn’t have a trustworthy SSL certification on Chrome, you may get the following error:

This site can’t provide a secure connection ERR_SSL_PROTOCOL_ERROR

This site can’t provide a secure connection. ERR_SSL_PROTOCOL_ERROR

How to know whether a website is secure or not? First things first, you check the URL of the website. If the connection is safe, the website address should start with https. Alternatively, you can also check a site’s security from the address bar on Google Chrome. To do so, to the left of the web address, see the security status:

  • Secure: it means the website is genuine.
  • Not secure or dangerous or Info or not secure: I would recommend you leave the website immediately.

If you are sure that the website is secure and safe, this tutorial will give you a few methods that you can try to fix it.

You may also like: Top 10 Best Free VPN Extensions For Google Chrome

How To Fix Err_SSL_Protocol_Error On Google Chrome

Method 1. Check Your Computer’s Date And Time Is Correct

If your computer’s date and time are incorrect, the SSL error code will occur. Before going on to the next method, make sure that your computer is showing the correct time with the current time. To do so, follow these steps below:
Step 1. Type Date and Time settings in the search box and click this setting. Then, click on change Date & Time to set it.
Step 2. Set Time automatically and set Time Zone automatically are ON.
Step 3. When done, click OK.

Method 2. Temporarily Disable Your Firewall and Antivirus Software

In some cases, your firewall, internet security programs or antivirus software blocks SSL connections. That may result in all of SSL connections can’t load completely and you get this error. Thus, I would recommend you temporarily turn off or even uninstall your firewall antivirus software, or internet security programs.
If the problem still persists, go to method 3.
Read more: How To Fix Your Connection Is Not Private Error On Google Chrome

Method 3. Disable Chrome QUIC Protocol

According to users Windows 10, you can easily fix SSL error by disabling of QUIC Protocol method in Chrome. To do that, proceed with these steps below
Step 1. To start, open your Google Chrome browser.
Step 2. Enter chrome://flags/ into the address bar and tap Enter.
Step 3. Then, look for the Experimental QUIC protocol and change the setting to Disable.
Step 4. After the change, restart your Google Chrome browser.
All is done. Now, you should stop reading this tutorial because the error is gone.

You may also like: How To Fix ERR_QUIC_PROTOCOL_ERROR in Google Chrome

Method 4. Clear your SSL state

Sometimes, SSL state may block some unknown connections, including the SSL connection and you face error code err_ssl_protocol_error. Follow these steps below to clear your SSL state:
Step 1. Go to Control Panel (icon view) and select Internet Options.
Step 2. Then, switch to the Content tab and click on the Clear SSL state button.
Step 3. Click OK to save changes.
After the SSL cache was successfully cleared, try to reload your Google Chrome browser again to check if the issue is gone or remains.

Method 5. Change Your Internet Security And Privacy Level

If you have set the High level as your security and privacy level, it might block some unknown connections, including SSL connections. And result, you may see
SSL connection error Err_SSL_Protocol_Error flashing on your computer screen. In this case, you simply change these settings to be Low or Medium and then your SSL connections will not be blocked anymore. To change your internet security and privacy level, follow these steps below:
Step 1. Go to Control Panel (icons view) and click Internet Options.
Step 2. Then, go to the Security tab and set Low or Medium level.
Step 3. Next, go to the Privacy tab, and set Low or Medium level.
You can now close Internet Properties window and then try to reload your website on Google Chrome browser again and check if the problem has resolved.

Method 6. Disable your Internet Browser Extensions

When you get SSL connection error the first time, I suggest you try open Google Chrome in Incognito mode and then load the website with SSL connection error in incognito mode. If the website works, I am sure that one of your extensions is giving this error. Now you have to find out the culprit extension and remove or disable the extension.
You can read this tutorial to learn how to disable or remove extensions in Google Chrome.


Hope something helps you. If you have any other SSL connections error you can see for the solution on my blog.


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