Not loading variation images

I’ve been using this plugin to zoom into product featured images as well as variation images. However, since i’ve updated, the plugin no longer zooms into the variation images and once a variation (a different color is selected, it changes back to the original thumbnail on hover). The website link is https://www.dsalinen.co.za.

I remember needing to add a piece of code into my functions.php page that fixed the issue the last time but that code seems to have disappeared now that i’ve updated.

https://www.ads-software.com/plugins/yith-woocommerce-zoom-magnifier/