To keep a site secure, website owners use an SSL certificate so that their site loads over HTTPS. When visiting your site, you may encounter an error code “NET::ERR_CERT_COMMON_NAME_INVALID” in Google Chrome Browser. It usually occurs due to misconfiguration of SSL. Other reason includes antivirus and firewall or another third-party extension. Don’t worry; we have devised several solutions to fix this error.
How to Fix NET::ERR_CERT_COMMON_NAME_INVALID Error?
Method 1: Check SSL/TLS Certificate Configuration
If your site/domain is not included in the SSL/TLS certificate, you will see a “NET::ERR_CERT_COMMON_NAME_INVALID” error. It is because of a mismatch between the site URL and the certificate. So check the installed certificate from your browser under the address bar section. If the SSL is not issued to your domain, you must fix it using your server control panel. If the certificate is SAN or wildcard, then ensure the browsing domain and subdomain are covered under the SAN and Wildcard certificate.
Method 2: Check the date and time
Sometimes Chrome browser shows a NET::ERR_CERT_COMMON_NAME_INVALID error because of the wrong date and time on your device. So you should recheck the date/time settings and adjust them if required.
Method 3: Check browser extensions
If you have installed extensions on your chrome browser, then make sure there is no bad extension because this could be a reason for the error. To check the culprit extension, tap on the “three dots” button on the top right corner of your browser. Now select More tools > Extensions. Please turn off all extensions to find the culprit and uninstall them to fix the SSL error.
Method 4: Check SSL/TLS certificate on both WWW and non-WWW version
SSL/TLS Certificates may not install on the WWW and non-WWW versions of your domain by default. In that case, you have to establish SSL/TLS certificate on both website versions. Otherwise, you will encounter the error due to redirection from WWW to the non-WWW version. So either install a proper SSL certificate on both versions or remove redirection. You can also try to fix the error by installing the Simple SSL WordPress plugin.