Incorrect semantic markup
Information, structure, or relationship that is presented visually MUST be conveyed programmatically or in text.
People who are blind cannot rely on the visual appearance and layout of a page to understand information, relationships, or structure that is conveyed only visually. In order to convey visual information to screen reader users it must be also provided programmatically or in text. This will allow screen reader users to understand information, relationships, or structure that is apparent visually.
Fix this issue by using the correct semantic markup for the element. See Issue Details for more information.