The error has a heading that says "Whitelabel Error Page" and says there was an unexpected error, 403 Forbidden. Now that I think about it I saw that message pretty much every time it launched a new window and proceeded to use the provided config/proxy so I'm not sure if that's normal, I'm just now seeing it stuck on this. I'm assuming that means I've gotten myself blocked from 10MM presumably since it seemed to have issues using the provided configs consistently, it appeared as though sometimes it would and wouldn't use them. Here's what it looks like for reference: