How to fix broken images for swatches after upgrading Magento to 2.3.x?

I have fixed swatches by adding the product_page_image_small, product_swatch_image_medium, and product_swatch_image_large entries to the etc/view.xml file of my design theme.
An example (set your own sizes for swatches):

The problem is described here:

See also: How to fix swatches appearance in Magento 2.2.7 and 2.3.0?