Creating a multi-page pdf from a multi-page presentation created in Adobe Express (AE)

I have a ten page slide presentation created in AE. I upload it to the internet after downloading my MP4 file from AE. That's worked fine. Now I would like to create a multipage PDF document from the work in AE. It will only download the first page. I've place my cursor on the last page and selected all slides and still only gives me the first page as a pdf. Any insight? Please and Thanks!