Hi @inboxcrayon
Thank you for posting in the Community!
First of all I would recommend you diasble the embed in Shopify - Save - and then enable it again.
It might also help to revisit this article: https://help.klaviyo.com/hc/en-us/articles/115005080407
If this still not works, there might be an issue with the Image.URL. If you do a catalog look up on the event, you should be able to investigate this further. In order to do so, use the code below and adapt it to your dynamic variables. This will show you the image.URL on the given event - copy this and open it in a browser to see if the URL reads correctly. From there, several issues might be identified, but I’m happy to help with that also!
{% catalog event.ProductID %} {{ catalog_item }} {% endcatalog %}
Hope this helps!
/Anna Sophie