I'm currently setting up a hosted custom catalog feed on our end, to be consumed by Klaviyo.
When I try to add it in the Catalog -> Custom Sources area, as detailed in this article: https://developers.klaviyo.com/en/docs/guide-to-syncing-a-custom-catalog-feed-to-klaviyo I get an error, see image here: https://i.imgur.com/08zmbjd.png
The XML structure is an exact copy of the XML example from the github, also mentioned in the article - link here: https://github.com/klaviyo/devportal/blob/master/custom_catalog_example.xml
Can anyone elaborate on why it’s not accepted?