ERR_CERT_AUTHORITY_INVALID Error: What It Is and How to Fix It

If you've encountered the ERR_CERT_AUTHORITY_INVALID error while trying to access a website, it means your browser cannot verify the website's SSL certificate. SSL certificates protect data by encrypting it, but for browsers to trust them, certificates must be issued by recognized Certificate Authorities (CA). The ERR_CERT_AUTHORITY_INVALID error indicates that the certificate is issued by an unreliable or unverified source.

Causes of the ERR_CERT_AUTHORITY_INVALID Error

This error may occur for several reasons:

  • The website's certificate is issued by an unauthorized Certificate Authority. It could be a self-signed certificate or issued by an unknown organization.
  • The certificate is outdated. SSL certificates have an expiration date and need to be renewed periodically.
  • Incorrect system date or time. If your device has the wrong date or time, the browser might not trust the certificate.
  • Browser software issues. Sometimes, cache or incorrect browser settings can cause this error.

How to Fix the ERR_CERT_AUTHORITY_INVALID Error

1. Check Your System’s Date and Time

Browsers verify the certificate’s validity based on the device's date and time. Make sure your device’s date and time are accurate to avoid this error.

2. Update Your Browser

Updating your browser can resolve many issues, including certificate errors. Ensure you’re using the latest version of your browser, like Google Chrome, Firefox, or Edge.

3. Clear Browser Cache and Cookies

Cached data can contain outdated certificate versions, potentially causing errors. Follow these steps to clear your browser’s cache and cookies:

  • Open your browser’s settings.
  • Go to the “Privacy and Security” section.
  • Locate the option to clear cache and cookies, and complete the clearing process.

4. Check Antivirus and VPN Settings

Some antivirus programs and VPNs may interfere with certificates. Try temporarily disabling your antivirus or VPN and see if the error is resolved.

5. Renew the Website’s SSL Certificate (if you’re the site owner)

If you own the website and see this error, check if your SSL certificate is valid and issued by a trusted Certificate Authority like Let’s Encrypt or Comodo. If the certificate has expired, renew it through your hosting control panel or contact customer support.