Every time I try to write I get a pop-up that says I need a membership subscription

Hello, I just needed some help with this issue, I don't know how to resolve it. I recently finished all of the worldbuilding for my Romance novel and I was going to start writing on one of my notebooks but when my pencil touched the page I got the aforementioned pop-up. And I know you may be wondering how I can still post on Reddit. I think it's because writing reddit posts doesn't really count as writing literature; but I have no idea how that might affect the ERP community. Did I do something wrong?