I was logged in on three computers and none of them is working right now. I'm greeted with a page that says HTTP ERROR 500.
If I connect via incognito I get the login-screen but when I try to login I get the same HTTP ERROR 500.
Tried both with Chrome and Firefox. All PCs.
Cache allrdy emptied so that didn't help.

Ok, something does seem wrong there.
Please would you PM me your email address so I can take a closer look at your account to figure it out?