InDesign Files Missing Content When Opened by Different Users
Hello Adobe Gurus! I need some help. I work in a student newspaper setting and recently two computers (or maybe accounts?) started doing this weird thing where pages designed on one computer by one designer look fine on that computer and most the others in the office, but whenever I try to open them on my computer, or when I am signed in on another machine, they are missing all the content such as images and text. (we use saved graphic textboxes that have filler text, and the filler text remains in them) It seems to be a problem between our adobe accounts because it's just between us. This designer often can't open my pages either.
The attached images are what his page looks like completed, and how it looks when I try to open it.
We have deleted both of our preference files on both computers and that has not worked. The problem seems to slowly be spreading to other user accounts as well because other people are sometimes not able to open his pages either, could it be something about how he is saving them?
(Currently he's doing what we all do and just going to file-save or using command+S.)
Also, I am not suuuuuper tech savy on the back end of adobe, so please give me steps to try for any suggestions so I can make sure I am doing it right.

Thank you for all your help!
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