Happened again this morning, much more serious, basically couldn't do anything.
Problem 'went away' as I restarted my machine (for another reason). Is this related to cookies?
Changed to using the 'stay logged in' feature, which I've never used before and never felt the need for. If there's a time limit to staying logged in, what's the point of an over-ride option? See if that makes a difference.
How would clearing cookies help? No, I never clear cookies - why should I? Genuine Q, no sarcasm (I hate the way there's no nuance to the typed word).