As for me, I'm an FH User from Indianapolis, IN in the EST time zone. But yeah, I know multiple people being affected by the issue, someone from Washington all the way in PST. It seems to be an issue with routers, according to a friend of mine, who switched from one router to another in her home and could suddenly access FH. I'm not sure if that's of any help, but!
The Error 500 is no longer showing up for me, but the page still doesn't seem to be loading, rather going back to the login page every time like I'd never entered my information. This seems fairly spotty, I hope it can be resolved soon! Good luck and thanks to staff for trying to figure this out.