adirondack.wcupa.edu uses an invalid security certificate.

I received the following message when trying to log into "myhousing" at West Chester University. As you can see, there's no "I understand the rules" option to allow me to bypass it. '''''This Connection is Untrusted''''' You have asked Firefox to connect securely to adirondack.wcupa.edu, but we can't confirm that your connection is secure. Normally, when you try to connect securely sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified. What Should I Do? If you usually connect to this site without problems, this error could mean that someone is trying to impersonate the site, and you shouldn't continue. Technical Details adirondack.wcupa.edu uses an invalid security certificate. The certificate is not trusted because no issuer chain was provided. (Error code: sec_error_unknown_issuer)