I tried viewing projects from demo content.Also created my own projects and added delicious image gallery. I see nothing on the page. but if i click it it will show the image fullscreen. I just installed this theme earlier yesterday and have been trying to figure it all out. I tried lazy load yes. double checked that i installed all demo content
here are a couple links
I believe the issue is related to a third party plugin. Do you use the EWWW Image Optimizer plugin or any plugin for dealing with images? Other users reported me the same issue in the past and generated by this type of plugin.