Processing failed [image link] on all variable products at Google Shopping

All variable products resulted in Processing failed [image link] at Google Merchant Center of Google Shopping. All Image links from the feed point to correct product photos.

Google shopping said “Wait for the product image to be crawled again (up to 3 days)”. But it’s already 1 week and still no improvements.

I have assigned photo for all:
1) Product Image
2) Product Gallery
3) Variations on Variable Products

I am using
WooCommerce Product Feed 3.7.15
WooCommerce 4.5.1
Wordpress 5.5.1

The page I need help with: [log in to see the link]