I see a few members trying to sign in and failing. I get an email every time this happens, so I know what is going on.
The system is working ok, or I would not be able to write this, but there be gremlins about.
I have done some maintenance clean up on the system and hopefully things will improve.
If you are in difficulty, and log in is not working, there is no point in trying again and again; all that happens is that you get locked out. But the good news is that this resets after half an hour.
One thing you can do is to clear your own browser memory, or try another browser.