Issue with saving woocommerce product image settings

Hello, I’m having issues with changing product image settings. When I change the settings to desired ones, press “publish” it says published but when I refresh the page I see that it doesn’t save and nothing has changed. Now all product images/thumbnails are different sizes and I cannot fix the problem. I hope someone here can help me. Thank you.
Some pictures, to understand the issue better:

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