The issue is you have zero instruction as to what is wrong with the graphic and/or how to fix it from a human being - instead just a stock message (sometimes incorrectly applied) that often suggests not re-submitting your work.
AND BTW... how is intellectual property of a 3d character a copyright infringement issue when you draw a graphic character in a 2d, pixelated format that sort of resembles the original and then present it in a free-to-play environment with no intention of marketing or making money on the 2d sprite?