"This site is not secure" and similar errors can prevent you from visiting certain web pages. This article discusses simple methods to diagnose the problem, assess your risk level, and mitigate potential security risks.
How do I fix the Chrome error 'Connection to site is not secure'? [Solution]
Browsers will return a "not secure" error when they can't verify a website's SSL certificate. SSL is a secure data encryption method that keeps transmitted data private and secure. If a browser detects a problem with a site's SSL certificate, it will stop loading the site and display a message that the site is not secure.
There are many things that can cause these errors, some of which are problems on the site’s end. The site may have an expired SSL certificate, no SSL certificate, or a certificate that is not set up correctly. It is also possible that a trusted organization did not issue the certificate.
When this warning appears in Chrome, you will see Not secure next to the URL. Firefox will show a red line through a lock icon. Similar warnings may appear in other browsers.
