I don't know if that helps me or not. (I don't use either.) However, as I said before, wordtwist should be an unsecured site, so it shouldn't complain about certificates. I did try entering https://www.wordtwist.org
in my IE, and it complained about the certificate, but took me there (after I clicked the appropriate box). Using http rather than https, things seem fine. If you're definitely using http, but still get that, I'm at a loss.