Product pictures not feeding into Storeya on Facebook

My Product pictures are not feeding into Storeya on Facebook

I am using woocommerce with the theme MINISHOP

I have contacted Storeya

After a week of going back and forth with deleting and installing plugins I was told this

Indeed, your feed https://sweethearted.com/?action=woocommerce_storeya does not contain a <g:image_link> tag.

Our developers will look into it to see if we can assist and I will update you soon.

then I was told

We are using the below function to bring your images:

$image_link = $this->get_the_post_thumbnail_src ( $post->ID, ‘shop_large’ );

if ( ! empty ( $image_link ) ) {
echo ” <g:image_link>$image_link</g:image_link>\n\r”;
}…
For some reason, it does not work in your shop.

I am not a developer and have no clue what to do next

My site is https://www.sweethearted.com

All the info about products feed into the storeya but the pictures are not showing up at all

Please advise