>>/1740/
I commented out the exclude nodes from {US}...
section from my endtorrc, and it can connect again.
It seems that directory servers went down in the regions that I allow, and I couldn't upload hidden service descriptors to the directory servers in excluded regions and so it failed. Still its strange that SCP stayed up. I'll run it with no excluded node regions for a couple of days and see how it goes.
I still stand by the censorship comment, if they blacklist your address from all of the directory servers your site will become unreachable by anyone.