Do you use any other admin menu management plugins, like “Adminimize”, “Admin menu editor”? Check if there are no restrictions for “Appearance” menu there.
I do not recommend to use different roles editing plugins together (I see WPFront menu at the screenshot), they may conflict with each other because of they work on the same field.
I may look on the issue on-line if you send me admin credentials (support [at-sign] role-editor.com)
