I’m configuring my WD personal network for the first time from a Windows 8.1 OS.
When I try to access it though the link https://www.wd2go.com , I enter the email-password and the user is properly recognized, but a Network Device Password is requested.
When I enter it and press “Sign it” botton, the browser sends my an Oracle-Java page, without any other message.
Can’t see your screenshots yet till mods approved. Based on what you’ve described, the browser is still using older JRE. I would uninstall java and clean its old version residue then reinstall the latest.