Is generative AI included with Acrobat Pro?

I attended a webinar today about Generative AI for Adobe Acrobat. It was very inspiring, and I tried using Generative Summary on a long book I was working on, just to see how it worked. It was fine. The second time I tried to use it on a different PDF I got the response “No requests remaining. SUBSCRIBE” Is the generative AI included with a monthly subscription? I pay $60/month and the tools show up so why am I unable to use them? When I searched for it most of the answers about credit limits concerned AI with images, not in Acrobat Pro.