Images Suddenly Disappearing from Articulate Storyline project

Oh no, Dawn! I'm sorry your images have gone missing, but a few things to look into. 

First, I'd check that you're using the latest update of Storyline. You can check by going to the "Help" Tab -> "About Articulate Storyline". Storyline 2 Update 13, Storyline 3 Update 5, or Storyline 360 Update 20 would be what you're looking for. 

Next, I'd also check that files are saved locally including the images you're inserting. Working from a shared or network drive is known to cause odd behavior ultimately resulting in file corruption. Here are a few other ways to prevent that. 

Lastly, you can try importing the problematic file into a new .story file to see if that resolves the behavior. The steps are outlined here for Storyline 3, but it'll be similar for other versions of Storyline. 

Let us know if you need anything else!