You do not have a link list with a handle set to exceptioal-art-framed-mounted-prints, or you do and it's empty. Go ahead and create a link list called Exceptional Art - Framed & Mounted Prints on your Navigation page and populate that link list with links that point to collections, to see collections listed here. Make sure the link list also has a handle set to exceptioal-art-framed-mounted-prints.