Excuse me, by looking at the screenshots i remembered.
There are two types of variables in Unreal. Local variables and class variables.
if you look at my initial attachment 2.npg, in the “My blueprint” section on the left, you see that NextSpawnPoint is located under the Local variables tab. You have to put it under the “variables” tab, where you see the defualtSceneRoot component and NewVar_0.
Hope this helps.