The HTTPS certificate has expired, and there is a security risk. The browser is marked with a red line;

HTTPS certificates are not trusted, some certificates do not support all browsers, and some browsers are not trusted, so they are marked with red lines;

I use my own SSL certificate, which is a self-signed SSL certificate. The browser doesn't trust me and prompts the red line.

The corresponding solutions are as follows:

If the certificate expires, it needs to be renewed at the CA institution;

Using globally trusted https certificates, such as the new certificate of Wotong CA, is a super-real SSL Pre certificate;

Replace the self-signed HTTPS certificate with a global trust certificate that supports all browsers;