Project not exporting

I'm unable to export a project from my laptop to my iphone. I've done it many times before with no issue. I just have a spinner on the phone where the file should be. I tried restarting the phone and changing the resolution of the file but nothing is working. At one point there was a ! telling me that there were incomplete files in the project and so it didn't import correctly, but the project is fine when I view it on my laptop.