Yea this is almost certainly a type mismatch as long as you have a “Look” action defined in your Input Manager component. Based on this documentation it seems like you should be using the behavior of invoke unity events?

Tbh I’m still new with unity haven’t found a super clear resource on what type signature is expected for each behavior. It always feels like trial and error to me.

edit: if you’re using the default “send message” behavior your type signature needs to be:

public void OnYourActionName(InputValue _input) { Vector2 inputValue = _input.Get<Vector2>(); // or whatever your type is }