I received an email saying that one of my questions had been answered, but when I went to look at the question, it had no answer?
The answer was deleted.
It's true, your question was answered by that user, but unfortunately, he turned out to be a troll--in this case, his username was a big clue, haha.
So at some time after he posted his "answer", I banned him and deleted the abusive post.
It so happens that I didn't get to him in time to prevent the email from being sent, which is why you came back to an empty answer by following the link provided in the email.
PS: I replaced your screenshot with a more safe-for-all-ages version! :D