Ok, so the class diagram is correct.
The function must be wrong then. It should not fail when looking for a SceneComponent that is in fact the type of the component i were looking for with the “SocketBlue” tag.
Yes, it does have the tag. I am the developer, I put the tag in the component. And it works in the way that I show in the image. The problem is that the function can’t find a SceneComponent with that tag. The function thinks it is an actor component.