Adobe Express Scenes Converted to Pages, Animation, Timeline Missing

Hello,

I am in the middle of creating a presentation with audio and video in Adobe Express. I already time many objects to appear, disappear, pan, etc. Suddenly, some objects don’t appear properly and I refreshed the browser.

Once the browser refreshed, it states a system change takes effect and my file has been updated and I need to check the update. Upon checking my file, I lost almost all of my changes. Scenes got converted to pages, which I don’t want because I want to flow from one scene to another. I no longer see the timeline either. All of my animation and timing to appear, disappear are gone.

How can I get the timeline back and how to convert the pages back to scenes? 
I would appreciate any guidance you have.

Thank you.
Regards,
Judith