Custom Anim Node

Hi everyone,

I am trying to build a custom anim node for Unreal 4 (4.16 and higher version) following mainly this tutorial (A new, community-hosted Unreal Engine Wiki - Announcements and Releases - Unreal Engine Forums).

Everything seams to compile for the AnimNode_base (Once I figure out that I need to add AnimGraph to the PublicDependencyModuleNames into the .Build.cs.)
Then I try to copy paste from AnimGraphNode_Fabrik (my final intend is to override FAnimNode_Fabrik to add constraint to Fabrik Node without having a custom engineā€¦)
But then, it just spam thousands of error like the screen shot bellow

Do you know what I am doing wrong ?

Thanks for your help and have a great day!