Photos not displaying

Hi guys

Im having problems with the frontend editor. My photos are already uploaded and ready to put onto a page. I choose the following: Frontend editor > Add Element > Masonry Media Grid > Add Pictures. It add them and it show them in the settings pane. But when I save, it does not appear on the page itself. It is blank, but the you can click on the “transparent picture” it appears (making the pic big). When I say transparent picture, i mean the picture is there, but it is just not showing in the grid format. Please help