magento2 – Product images that do not appear in the interface

I am using Magento 2.3.0. I have added a product with an image with roles for Miniature, Base and Small, all verified. "Hide from the product page" is NOT marked. The images are in JPG format and are displayed well in the Magento backend, here is a screenshot:

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As you can see, the products are t-shirts and the images are visible in the backend. However, the image does not appear anywhere in the interface. Observe the graph of turns where the product image should be:

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What could be the problem? Please help.