My page does not pass the AMP-HTML validation in Structured Data Testing Tool
If I copy the same html code in Structured Data Testing Tool it pass validation. Why?
My page is: http://www.fantaformazione.com/?id=100&=1
This works:
https://gist.github.com/jaygray0919/8b5d86fc63ff6ea3656f0a0253fc31e7
Make sure that your image sizes are accurate. Note that I used the accurate values for Mertens1.jpg. You may re-scale them in CSS - or let Google do it dynamically - but provide accurate data in the JSON-LD
island.
Also make sure that the size properties are ordered by width and then height.