The images on my website are not loaded on the IPHONE devices

Hello good day

I would like help with the following:

For a few days my website does not show the images when I enter from an iPhone mobile, I have tried with all my acquaintances that they have iPhones and they do not load the images, however, the web looks good on computers and android mobiles, I have We talk to the people who have sold me the theme and they tell me that it is a server or image optimization problem.

I would like to know can you help me

the problem occurs with both the Safari or Chrome browser of an Iphone

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