TeamCity Hub Plugin link has bad cert Follow

Hi, just trying to setup a set of the jetbrains team tool to test/consider switching to, tried to get the hub plugin for teamcity, only to be confronted with a bad, cert, whats up?

its this link:

https://ftp.intellij.net/pub/.teamcity/hub-plugin/2017.1.x/hub-plugin.zip

on this page:

https://confluence.jetbrains.com/display/TW/TeamCity+Hub+Plugin#TeamCityHubPlugin-DownloadandInstallationInstructions