I'm not sure we have enough information to answer your question. Where and when did you receive this message? What were you doing?
My guess would be that you had written some on your hub, perhaps you poem, and then exited out of it. Is that when you received this message?
If so, my guess would be that it considers your word count to be too small. I generally try not to have a word count of less than 500. You can add what you would normally add to the bottom and see if you still get the error message.
I hope this helps, because I can only answer your question once. But if you expound on what you are asking, by answering the questions I have asked, maybe someone else will be able to help you.