Yes I have had difficulties several times. Instead of getting straight onto the questions page as I normally do I am asked to log in, and my login details are then rejected as invalid.(Time after time...) I even tried logging in as a new member (I used to be Steragram) but because my email address was clearly the same I was still rejected. My son eventually put it right for me but sadly I don't understand what he did. It is apparently not a site problem and the techies on here couldn't help. I am so sorry the bug has bitten you as well. I will ask my son if he could explain what he did but don't hold your breath.
Good luck.