Just fade-up with 502 bad gateway error, I got it almost more than 15-20 times today.
They know about this and have now fixed it.
I was in this trouble …
I think it’s a high load on the website, I usually receive such thing if there is a lot of queries. More people online doing stuff, more load. It happens, they do some fixes, reload… for a while it’s ok, but after it happens again. I experience this bad gateway pretty often.