Encrypted for protection, self-signed to save money
The encrypted login page protects your information. Your web browser will give you a warning. This is because the encryption certificate is from a source unknown: me! This is a useful security feature. Be concerned if you see this screen when logging in to your bank. Or, any other site that should be able to pay for a certificate authority.
But using the above login link you should expect this warning. When asked, choose to proceed to the website or accept the certificate. Sometimes you have to click ‘advanced’ or ‘details’ to see this option.
On some web browsers they will remember that you are okay with this self signed certificate. Others will prompt you every time. See the examples on this page.