scroll box not showing

I’ve created a box but it is not showing up on the page I specified: http://pkgcompliance.com/plugin_test_scroll/ – please advise as soon as you can – need to go live later today! THANK YOU!!

https://wordpress.org/plugins/scroll-triggered-boxes/