Unable to edit PDF on my iPhone even though I am subscribed to the feature

[#1]

As of yesterday, I subscribed to the free trial of Adobe Acrobat Premium so I could try out the Edit PDF feature. When I first did it, an activation screen came up, but nothing seemed to be happening so after a while I closed the window. For some reason, when I click on Edit PDF after clicking on the blue pencil in the bottom right corner, it keeps redirecting me to the subscription page. Wherever I click on subscribe, it acknowledges I am subscribed, but nothing happens.