Issues with Sharing Gamma Presentations: Need Help!

Hello lovely Gamma Friends!! I created a presentation today with a client live on a call, mind blow as they always are when they are current PPT users😂 I used the Share link as I had done before and for whatever reason it just would not show up in her version of Gamma. She could open it but not edit it and it didn't remain in her version of Gamma like under the "Share with you" section. I feel like I shared one prior and the person could easily edit. Do you need a paid account? She just signed up today for a free account. Any ideas what might be off?