Need to know if this site shows as insecure in Internet Explorer

https://mywater.kcmo.org/cus/mcuslogin.jsp

Shows as having a certificate from an unknown issuer in Pale Moon on
Windows 8.1. The Firefox users I've asked over on Mozilla's news server
are here and there with their answers-mostly because I inadvertently
gave them a partial URL instead of the full one to the login page,
giving most of them blank screens. I corrected it in a later post but
no one picked up on it again.

Anyway, I'd appreciate any of you trying to hit the URL as I've given it
here and letting me know if IE has any issues with its security. Trying
to decide whether to bypass the error or not.