OJS software with not all

Hi Israel. I’m trying to help Anita with this problem. I see people with this OJS 3.1 software installed have the same look (dark blue); and I see the instruction manual shows a beige/cream/yellow look. However, there is no “Payments” option on the blue section.

If we look at this bug report, we see that there IS a payments option

BUT … going to the paypal link below about REST APIs doesnt seem to help. How do we turn on or otherwise activate the “payment” button?