Check the data saving and/or image loading settings in your browser. Some browsers have an option not to load website images and other multimedia, usually to save data and try to speed things up if on a slow network.
I see in your screen-shot, the phone is using 2G/EDGE, rather than 3G or 4G or WiFi. EDGE is very slow, so it could be the browser is just timing out while waiting for website images to load.