Powerpoint not showing images

hi everyone,

I just purchased a base model and mid range Mac Mini running 10.10.5 and downloaded Office 365. In power point 2016, when I load a presentation ive been working on from another computer via iCloud, thumbdrive, or OneDrive, none of the images I had in my presentation appear. But on my windows computer they do. Ive been trying to research this but have found no answer. Can anybody help?