So I’ve been playing around with your CSV file, trying to do test imports onto a store I’m not using.
The issue is definitely not with your CSV file, but rather the actual images that you’ve uploaded to Shopify (and then linked to in the CSV).
Something is wrong with those images (before you uploaded them to Shopify).
What’s strange is: if I download the image as a WEBP file, then reupload them to my own files section, then replace the links in the CSV … then it will let me import them without any errors. What this tells me is that by downloading the images in another format, it’s adding metadata to the image (that they’re somehow originally missing).
What I would recommend doing, if you have all of the images still saved to your computer, is bulk converting them to another image format (such as PNG). There are a number of free sites you can use for this (https://www.google.com/search?q=bulk+convert+images+to+png).
By converting the images to another format, it should add all of the necessary metadata to the images, and then - in theory - you should be able to reupload them to Shopify, and use them within your CSV spreadsheets.
Very weird issue. It might be worth reaching out to Shopify’s support team directly, to have their tech team look into this issue.
Sorry I couldn’t be of more help on this one. Your CSV format is good though! 