Hey @LuBuSniper!
Something to understand here is the parent/child relationship is of CLASSes(violet) not objects(blue).
This is on the player blueprint. Notice it is saying “AC Base Child” as you have named it, as the target, with target being an AC Base Child OBJECT.
Do you possibly have an “AC_Base” AND an “AC_Base_Child” on the player?
Do you need both if Child is doing everything the Parent is doing? (meaning parent logic is running 2x, once with the child’s logic and once without)
Here you are saying “Use “Do It” event on AC Base Child”. You could also pull in AC_Base and pull off it to have it do the same if you wish.
Hope that helps!