'large--one-quarter large-up--one-quarter medium--one-third medium-up--one-third small--one-half large--col-3 medium--col-4 small--col-6' %}
You do not have a link list with a handle set to , or you do and it's empty. Go ahead and create a link list called 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 .