Indeed at least for an hour or two. I only just was able to sign in again. Luckily Online Live Chat support was informed of the issue while I was chatting with them.
It was down the past 4 hours for me (could have been earlier as that was the first time I tried this morning). Attempting to log in did not work. Once it came back, logging in was not necessary for me. Seems to be running well now, though.