StoryLine - Pictures / Images not showing

I'm experiencing a similar issue. I have copied and pasted a scene into a new file. All of the images that were on the original slides are not showing (both while in editing mode and in preview); this includes png files, characters from the 360 library,  text to speech and audio files. They show as an element on the timeline, but they are not showing on the slide. Text to speech and audio files show on timeline list, but then do not show on the actual timeline itself (if that makes sense). 

Example attached. When previewing you will need to wait for a few seconds before first animation appears. There is meant to be a phone showing and audio file with a ringing phone, but it's not working...hence this query. I could just put these files back in, but I have multiple scenarios I need to adapt and use, so really don't want to have to redo everything. 

I'm using the most up to date version of 360, using Google Chrome (if that helps).