You do not have a link list with a handle set to cab-lights-94-03-e-series-7-3, or you do and it's empty. Go ahead and create a link list called Cab Lights 94-03 E-Series 7.3 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 cab-lights-94-03-e-series-7-3.