Below are the most common publishing errors for Shopify:
🔔 Note: If your error isn't listed here, try to take a look into the general publishing errors: Websites publishing errors
Start solving your publishing errors
1. INVALID_ARGUMENT: MimeType is not matching the file extension
📔 Explanation:
This typically happens when the cover image has a different extension than what the website expects. For example, the featured image field expects a PNG file while you added a JPG/JPEG file in StoryChief.
✅ Solution:
Check the current image file type in the field (right click + inspect).
On your computer (or with a software), change the file type. If it was PNG, make it JPG & vice versa.
Remove the current featured image and replace it with your new image.
Retry publishing.