Can't edit spline points. Vector Array, for each, "Add Spline Point at Index"

Hi, I can’t edit my spline points.
My steps.

  1. Hard coded 3 vector points
  2. Make vector Array
  3. ForEchLoop
  4. Add Spline Point at Index

I can see the spline in the viewport but I cant edit any points, they are pruple. What do I need to do?