I just kept on getting the error message and looked in vain for that illusive non-existent question. When I finally caught on that "Hogwarts" was a question, Harry Potter was my first answer.
For a site catering to writers and authors who are trying to write grammatically perfect queries and synopses, it is just SOOOO wrong to write a single proper noun and call it a question, without even using any punctuation! Might I suggest the admin either:
1. not call it a question but rather word association, or
2. form a question, such as "What do you associate with Hogwarts?" or
3. at the very least put a question mark after "Hogwarts" so we know at least where to find that hidden question!!!!!
If there are present members who only found the answer because they Googled this thread, how many more are there who just gave up?