AutoNav Plugin

This page has a shortcode for autonav to show thumbnails of its subpages but they are not appearing for some reason?
This page isnt working correctly:
http://bestbeachgetaways.com/our-areas/panama-city-beach2/panama-city-beach-condo-rentals/ocean-villa-resort/

This page uses the same autonav shortcode and works fine?
http://bestbeachgetaways.com/our-areas/panama-city-beach2/panama-city-beach-condo-rentals/

https://wordpress.org/plugins/autonav/