365 embedded documents year-to-year

Community Member

Last school year our district had us save our courses to commons so that we can reuse the content each year.  I imported my course from last year and none of the embedded documents from word or pdf docs will open on the student side at all.  In student view it says "unable to load the document"  This is happening to many other teachers in our building.  I can not imagine that this is normal so I am hoping somone can guide this novice with some instructions/suggestions.