Thank you for the quick answer !
Sadly I have the exact same error.
So here is what I did :
1. I uninstalled the two plugin (N-Media WooCommerce PPOM v13.7 and N-Media WooCommerce PPOM PRO v13.4)
2. I downloaded N-Media WooCommerce PPOM v13.7 https://fr.wordpress.org/plugins/woocommerce-product-addon/ and Installed it as explained in the “Installation” tab.
3. I downloaded N-Media WooCommerce PPOM PRO v13.4 from https://clients.najeebmedia.com/client-area/ and installed as usual.
4. I can see my previous PPOM Fields and can not delete image (as in my initial post)
I should add that just after the reinstallation, my previous PPOM Fields where still here, as if they were never deleted from my website’s databse.
Do you have an idea ?
Thank you !