I've been getting this message pretty frequently. All I have to do is click "reload" and then it works, but right now it's about 20% of the time I click on a post (or when I submit a post reply) I get this error. I was having a similar issue about a month ago, but after the Dojo went completely down for everybody (it was only for a very short time), it was a lot better once it came back up. But the past week this message has become more and more frequent.