Embed Post Votes outside of WordPress install.

I am using wordpress as a database engine to power a website which uses custom designed pages for nearly every page. I wanted to include the voting system in various parts of the website for the novelty of being able to vote on ideas, character posts and other activities.

My wordpress install is in its own directory and I use its functionality with wp-load.
I have a wordpress “the loop” and at the end I use echo do_shortcode('[rating-system-posts counter="yes"]'); in order to allow users to vote.
However all that shows up is the counted number. No buttons.

What can I do to properly embed this voting system outside of the wordpress install?

https://wordpress.org/plugins/rating-system/