Cannot see output on web page, but can in developer view

Hi I would be grateful for some assistance.
I have some values that appear in developer view but I cannot get them to display on the page.
I have used set value in the API, have called the API from a server connect form and added the data to a modal. There is no redirect it is just back to the same page. But the data will not show. Obviously I have made a mistake but I would be grateful if someone can point out the error of my ways.

Screenshot 2021-01-19 at 21.43.454499×2470 1.12 MB

Screenshot 2021-01-19 at 21.41.303349×1791 762 KB