Hopefully, you don’t mind if we ask a few questions.
What version of WordPress are you using? It’s very interesting as we have never had anyone reporting such issue.
“Queues” really are nothing but “categories” in WordPress language. They are just like your blog category, but with a different label, if it makes sense. The error you are facing would mean a category a.k.a. a queue couldn’t be created in the database for some reason. Do you get the same error every time you create a new queue?