Question about "Read more of this series" box

[astushkin]

Hi, I noticed that in my current series "A New York Haunting", of which 8 of 12 parts have recently been submitted, the "Read more of this series" box that normally appears on the final page of each submission below the "Story tags" box is not present. My older series have this box, and checking among a sample of other authors' current series, I see that some have it and some don't.

Is it possible to have this box appear on my ongoing story so readers can quickly link to next and previous chapters?

Thanks