Error on product list / shop page

I’m trying to show the variation images on my product list / shop page. Where the placeholders are the image is empty, instead they are all displayed vertically at a much larger size.

An image explaining this can be found here
https://static.lunaled.co.uk/uploads/2020/06/Error.png

I purchase your plugin through code canyon with this license
5e83e69f-f6de-4e3d-9864-e47e0089****