FIX: Err_cert_common_name_invalid error in Chrome

Radu Tyrsina
by Radu Tyrsina
CEO & Founder
Radu Tyrsina has been a Windows fan ever since he got his first PC, a Pentium III (a monster at that time). For most of the kids of his age, the Internet was an... Read more
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  • Google Chrome is one of the most popular and most used web browsers in the world.
  • Despite being a great browser, Chrome errors such as Err_cert_common_name_invalid can still occur.
  • This article is just a part of our Chrome hub, so if you’re looking for more useful guides, be sure to check it out.
  • For more great and helpful articles, visit our dedicated Fix page.
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While each Chrome update resolves known bugs in the browser, it can also introduce new issues if things don’t go as they should. Other problems may also arise from various extensions installed in your browser, too.

These issues include the most common error users often stumble on their browser: ERR_CERT_COMMON_NAME_INVALID.

This common error is type of SSL error that shows up in many other platforms and is due to a server misconfiguration of the website you are visiting, a bug in Chrome, firewall issues, or third-party extensions.

The issue displays the following message:

Your connection is not private.

In this post, we try to provide a solution to this kind of bug.

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How do I fix Err_cert_common_name_invalid error in Chrome?

  1. Try out a different browser
  2. Disable your antivirus or firewall
  3. Reinstall Chrome
  4. Identify problematic extensions
  5. Check proxy settings
  6. Clear cache and data
  7. Clean your SSL cache
  8. Update your Chrome

1. Try out a different browser

Since you might be spending some time trying to fix this Chrome error, you may need a secondary web browser to use until the job is done.

No web browser is better suited to act as a Chrome alternative than Opera, especially thanks to the common Chromium engine.

However, Opera is far more lightweight than Chrome, having just a fraction of the resource requirements, even with 20 tabs opened and 10 extensions installed.

Additionally, the browser is incredibly table and frequently updated, so any error you may ever encounter will be fixed by itself soon enough anyway.



Try out this ultra-fast web browser for a change, and it might end up being your new deafult one soon enough!

2. Disable your antivirus or firewall

Antivirus programs and firewall applications are also among the culprits for the errors in your browser. This results in SSL issues that will limit your browsing.

You may choose to disable security applications in the interim and check if it solves the issue.

Additionally, you could try using an antivirus tool that is both reliable and has minimum system interferences, such as Bitdefender.

This tool runs silently in the background, stopping all forms of malware before it ever has the chance to even enter your PC.

More so, it can perform deeps scans of your system, being able to easily identify malware that was there before you even started using it.

However, despite it constantly running, you will never feel your system slowing down since the RAM and CPU impact is at a minimum.

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3. Reinstall Chrome

In the end, you can also try reinstalling Chrome. This should resolve possible issues and get you in the clear. Of course, don’t forget to backup your bookmarks and passwords.

Just open Control Panel > Uninstall a program. Uninstall the Chrome and delete associated files. You can do it manually or use a third-party uninstaller.

One such uninstaller is Iobit Uninstaller Pro, and it will make sure that your browser will be removed as if it was never there.

Simply run the program, select Google Chrome, uninstall it, and then remove any leftover files as well.

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4. Identify problematic extensions

Scout for the extensions or plugins that may be causing the problem. To determine that an extension is causing the trouble, browse in incognito mode first and see if everything is fine.

If you don’t see the error message in incognito mode, then an extension might be the culprit.

To identify the problematic extension, first, disable all the plugins in your Chrome browser by unchecking the box to their right.

Then enable one extension at a time and visit any site to see if the error message still appears. Repeat this step for the rest of the extensions until you find the culprit.

Remove the extension that’s causing the problem by hitting the trash bin icon to the right.

5. Check proxy settings

  1. Launch the Start menu and type inetcpl.cpl in the Search box to open Internet Properties
  2. Go to the Connections tab.
  3. Then select Settings and make sure that Automatically detect settings is checked and nothing else.
  4. Hit OK.

Now check if the error is gone after correcting your proxy settings.

Proxy settings can also affect how your browser works. A small error in the configuration is enough to cause problems with browsing, so be sure to check your proxy settings.

6. Clear cache and data

  1. Press CTRL + H on your keyboard.
  2. Select Clear Browsing Data.
  3. Check relevant options for cache, cookies, content license, hosted app data.
  4. Then click Clear browsing data.


7. Clean your SSL cache

  1. Open Internet Properties and go to Content tab.
  2. Then, select Clear SSL State.
  3. To do it on your browser, go to Settings > Show Advanced Settings > Change Proxy Settings.
  4. Select the Content tab.

8. Update your Chrome

Also, make sure that your Chrome browser is up-to-date. Outdated applications are a fountain of various problems. Just open Chrome > 3-dot menu > About Google Chrome and update it.

If you know of any other method to fix the ERR_CERT_COMMON_NAME_INVALID issue in Chrome, share them with us in the comment section below!

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Frequently Asked Questions

  • Error Err_cert_common_name_invalid means that there’s a problem with a security certificate of the website you’re trying to access.

  • To fix revoked certificate in Chrome, go to Internet Properties > Advanced. Uncheck Publisher certificated revocation and enable Server certificate revocation.

  • To fix invalid certificate errors in Chrome, try disabling your antivirus and firewall, update Chrome to the latest version and clear the SSL cache.

  • To fix SSL connection error, temporarily disable your antivirus and check if that helps. Alternatively, remove the problematic browser extensions.

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