Photo's are missing after rendering

Hi there! I'm making a movie with photo's. In Premiere Rush its looks all fine, but when I rendering the movie and watch it back on my computer there are missing parts.. Some photo's are not vissible at all. I have try to open the missing photo's in a another program and export it again to JPG. Then I upload the new photo to the video and render it again. Still the same issue.. What is the problem here?