I get the same thing. But what I have experienced is that it can't validate the credentials in the HQ portion of the site. I can log into the pinocc.io/solo site and that is when I just get the blank screen. If I logout of that solo page, the request to login finally shows up, but it will fail after entering all the credentials. But when I return to the Solo page, it knows who I am. So, stating the obvious here, the page has other issues than just a bad gateway message.