No Scrollbar

**Description**
While reading the book or when the viewer is loaded then the user is unable to scroll the screen or the scrollbar is missing.
> What problem are we solving? What does the experience look like today? What are the symptoms? How can one reproduce the problem?

**Evidence / Screenshot (if possible)**

> Include evidence of the problem or provide a screenshot.

**Expectation**

> What should be happening? What will it look like / how will it behave when fixed?

There should be a scrollbar.

> What is the proposed solution / implementation? Is there a precedent of this approach succeeding elsewhere?

pls assign this to me, I would like to work on this issue.