Aaaaaactually, my bad. It's broken again now. I sent their support desk a heads up, but just to be crystal clear the problem isn't on Umbra's end. This time, anyway.
In Nev's own words, because he's the techie out of the two of us: Their ssl certificate expired and because our voting button links to the secure website which technically doesnt exist as long as their ssl certificate isnt in place, computers and phones think someone is hacking or redirecting. They aren't, the site just needs to renew its stuff.
So there you have it! The link is entirely safe, it's just automated security making a fuss out of nothing.