Explain the reason:

Website SSL certificate is no longer valid.

Computer system time error.

The certificate of the external connection website has expired.

Unsafe http resources are loaded in the website, or the certificate is not installed correctly.

Use a self-signed SSL certificate.

Use certificates with poor generality.

The SSL certificate does not match the domain name of the website.

Solution: Make sure that you are managing the website and ask Gworg to re-sign the SSL certificate and replace the invalid server certificate.