Search results pagination links not appearing

Hi guys,

I have a plugin, which adds pagination to certain pages (e.g. search results), and it's not rendering where it should be / no output.

It's based off of the standard Wordpress pagination code, as found here: https://codex.wordpress.org/Function_Reference/paginate_links

Example of the issue can be seen here:
http://demo.xlearn.net.au/?s=test

The plugin is located here:
/wp-content/plugins/pagination/pagination.php

Any thoughts on why this isn't working would be great.

Thanks!
Brett