Doesn’t work for me at all

I’m having the problem that the plugin doesn’t work for me at all. It will work on the default theme, and the default WordPress gallery will work, but on my custom theme there is nothing but a blank space when I use Polaroid Gallery. I’m assuming it’s because I’m not loading something it needs? Do you have any ideas?

https://www.shrouded.space/index.php/2017/06/05/gallery-test/