the site has been marked with "Dangerous" notification in Google. I think somehow, BK8 team needed to fixed these.
On my side, it's related to Microsoft/Windows Defender. If you disable the program, then it will be removed. However, it's quite scary to disable such a program.
I've notified BK8 support, hopefully it will be fixed asap...
Anyway, DWYOR, if you
really need to log in, I tried and it still works.