Picture wont show up/load


I work as a painter/varnisher. And I wanted to set up a website where my clients could see the finished rooms. I have found this template which is perfect for me https://github.com/rampatra/photography.

I tried uploading images, but they wont show up, only a grey box where supposedly the picture should be. I tried resizing it but that didn’t help.

Im new to all this would really appreciate it if someone could pinpoint me.

It looks like the images on that site are loading now. Did you manage to fix it already? If not, is there a specific page/image that isn’t loading?