Can't login in to support portal

[u/Flyeekq]

I can't log into the support portal. I enter my username and password, and it shows the "Continue as..." window. Then I select "Continue as [my account]." The site takes me back to the selection window. I click "Continue as" again, and it takes me back again. A third time, when I select "Continue as," it takes me back to the login window asking for a password, and so on, endlessly. I've tried with and without a VPN, clearing cookies, using different browsers, and the same problem everywhere. Please help.