It was like an hour or something that all I could get was 504 gateway errors.
Access is back now, I was starting to suffer withdrawls.
If you haven't seen this guy, yet, it looks like he is making waves.
@soladoni
I don't know what to think of it, but it sure makes the popcorn taste good!

source
It sometimes happens to me, maybe the signal of my net is weak or it has something to do the system maintenance of the website.
I was getting the same message and it has probably something to do with the website.
I figured we were getting ddos'd again.
may be a ddos attack. even tab trader stopped working for a while due to DDOS attack.
Yes, It was happening to all users.