hyperwallet.ml ssl cert is getting flagged by browsers since the hyperstap.ml is pointing to https. You could use the "http://hyperwallet.ml/bootstrap.zip" link so it doesn't get flagged.
It's a temporary decision to sign a cert by myself, just not to mess with LetsEncrypt (it's kind of weird, like all free stuff). SSL isn't needed here, I will remove it. It's a part of a BIP39 web wallet development, sorry for the inconvenience.