This is strange indeed.

Not a single thread on here related to the 3084 error has ever had an official reply, and searching the Internet, nobody has ever said anything about how it was resolved for them.

So, unless someone that has had this resolved by SE (can resolve by maintenance, but someone said it didn't work for them) replies with how it was resolved, we can only speculate.
But in any case, this used to be like one post (Error 3084) in two or three years, now it is quite a few posts in a matter of a week or two...