I am very much a beginner with the organizer/editor thing. Looks like if I ever get it organized it could be really useful. So, I'm trying. I am on a MAC. I clicked on a picture in organizer to go to editor. A message came up asking me if I wanted to allow Editor to access my documents folder. Being the cautious person that I am, I said no. Then it proceeded to tell me my picture was locked or I do not have permissions to open it. It then explanied how to unlock it. Anyway it now says that on any picture I try to send to editor. If I open the file directly from editor its okay. How do I go back and give Editor permission to open files. I'm convinced that is the problem.
I know nothing about Macs and have never seen this issue raised before. I suggest you tell us what version of Elements you are using and what version of the Mac OS also. Other than that, all I can suggest is that you reset the warnings and/or the preferences files.
Take a look at this link to reset the warnings. If that doesn't work, look at the rest of the information on that webpage.