Sharing files with Creative Cloud Assets - can someone help?

I have been using Creative Cloud Assets for sharing files with my clients for a few weeks, and it was working great. I'm simply making my file public, and sending the link to the client. All of a sudden my client is getting a message saying the link she received has expired, even though I just put it up there for her. What I click on it it works. Does anyone what's going on, and how I can fix it?