This connection is not reliable
You have asked Firefox to connect to YOURDOMAIN with a secure connection, but we can not confirm that the connection is secure.
Usually when you connect with a secure connection, websites will provide a secure identity, to prove that you visit the right site. But the identity of this site is not verified.
What should I do?
If you usually connect to this site without any problems, this error message may mean that someone tries to emulate the site and you should not continue.
Technical details # 1
YOURDOMAIN uses an invalid security certificate.
The certificate is not trusted because the issuer’s certificate is unknown.
The certificate is only valid for ANNUALS
(Error code: sec_error_unknown_issuer)
The problem here is that Firefox does not recognize the root because either intermediate (intermediate) certificate (s) and / or root (root) certificate is not installed or installed properly.
Solution: is to install intermediate certificates and root certificates on the web server.