The question has not met any of the requirements to become community wiki. Oddly, the revision history now states that the question was turned into a community wiki question immediately upon posting, yet I don't recall having posted this question as community wiki; I'm certain I gained reputation points from upvotes and accepting an answer. Why is the state of this question different now?
I'm certain you accidentally marked it as Community Wiki when you first asked it. According to the timeline of the question, you got upvotes as early as the day you posted it. Your reputation graph from your profile page, however, lists no reputation gain for that question during that period. If you double-check your reputation audit, I'm sure you'll find post 390250 to be equally devoid of reputation change.