Hello Marienella,
If Safari is unable to load any images, you'll want to start with these steps: If you don’t see images on a webpage in Safari on Mac
If you have any sort of antivirus/security/vpn software installed on the computer, try disabling it to make sure that is not blocking the images.
It's also a good idea to make sure the computer is up to date.
Update macOS on Mac
If you're still unable to load images in Safari, try testing another user account on the computer. This will help you isolate if the problem is just with a specific user account or a system wide issue.
Add a user or group on Mac
Cheers!