It appears that this was rejected by the automated ML bot eMiLy. As for the reason, it could be any number of things, to be honest. Maybe the reflection in the glass confused her?
You can appeal it from your contributions page if you would like.
A piece of advice, your supporting photo should always have the Point of Interest that your nominating in it as well. Typically a wider shot.
Here are a couple of threads with some great examples of excellent supporting photos: