I see that they have their own forum. Looking there, I see that someone has reported the problem, and that someone else has replied saying:
The site was hacked and the admin had to restrict some settings for our safety. It's temporary, I'm sure.
It is, to the best of my knowledge, still safe to download stories and visit the Rate Me pages, but I don't believe it's currently possible to leave new ratings, search by SQL, or author or title.
It is however, possible to search by year.
We'll just have to keep our fingers crossed that the admin will have time to fix and improve things over the next week or so.