How am I not authorized to open my own account? (Or notifications?) i got the message a lot recently, but reloading the page always helped. Not anymore.

EDIT: Okayyy. deleting cookies and restarting the browser helped that. Which doesn't mean this thing is pretty deep rooted and annoying.

EDIT2: And now it's broken again.....

Cookies deleted, browser restarted and I could access my account exactly once before I couldn't. Do I have to delete cookies every time before I go to my account now?