We can neither! (No. Seriously. We can't. As long as you don't give us an invite.)
Wait - you suspect a bug. Nothing works? No login at all?
To be honest in 97% of the cases this is a failure from the person in front of the computer... Please check if you have spaces before or after your Mail-adress and password ans also check exact spelling. Did you use your last updated password? Did you update the new password in your password-store?
if nothing helps - get in touch. we can help you out.
Phone:+49 (0) 221.337 4471