First, welcome to the community. It makes it much easier for us to help when you have attached the data table even if it is anonymized. This way we can also, perhaps see what you've done.
What is an element? Do you mean a column in the data table? When you say you drag it to the "graph window" of Graph Builder, are you actually dragging it to a Drop Zone (i.e., Y, Group X, X, Group Y, Overlay, etc.)?
see here:
https://www.jmp.com/support/help/en/17.0/?os=mac&source=application#page/jmp/graph-zones.shtml#
"All models are wrong, some are useful" G.E.P. Box