Why may images not be displayed on the site, but shown by URL?

Question

Joomla

There is a site https://okna-psk.ru on it at the bottom of the "our partners" block, there, if you inspect, a block with pictures is displayed, they are displayed on the URL but not on the page, and wherever they are inserted. What could it be ?

Answer 1

I decided by creating a new folder and uploading new pictures, but the very essence of the question remains, why this happened I don’t understand