As you have noticed, ratings stopped loading ~45 minutes ago. Our hosting provider is apparently experiencing quite serious problems with their load balancers. They are working on the issue right now and hopefully the problem will be fixed shortly.
4:45 PM UTC: After an hour that felt like a week, we’re finally back online. Please accept our apologies for the inconvenience!
Apr 30th: It turns out the outage was caused by a software problem in one of the load balancers, which was fixed only after the malfunctioning unit was unplugged from the network. We have taken other precautions to make sure the downtime will be shorter should a similar situation occur in future.