Tonight I got a topic update notification mail, which I tried to check this morning. I had to log in again ... no surprise, they are sparse for me.
So I entered my login data ... and back to the login page.
Did I forget that I changed the password? ... No, other usual passwords didn't work either.
Back to the forum base ... no, still the login page?
Manually typing the URL ... the same login page!?!
And some messages hardly telling anything useful: "This menu has been disabled", and "Sorry, you are not permitted to use this board".
If that forum is in maintenance mode, I would suggest a more obvious message. This content makes me afraid that there may be worse issues...