I can’t understand why use location, because I am a art asset maker （probably），Start learning Ue4 in 2021， poor english ，sorry 。 I use “find input key” , then get Spline point ，prev one and next one，use “get distance along spline at spline point ”to get two distance values， then let them subtract，so get two spline point length。“fraction” the input key，multiply two point ’s length and plus prev point‘s distance。 in Ue4.24
[Get Distance At Spline Closest to World Location posted by Freedomist | blueprintUE | PasteBin For Unreal Engine 4][1]
