How to implement required libraries for Addressable?

Hi all,

I have installed the Addressable feature (1.1.10). Everything looks fine, however I cannot define “UnityEngine.Addressable” and “UnityEngine.ResourceManagement.AsyncOperations” in my code. How can I fix this?

EDIT: One of the libraries should be “UnityEngine.AddressableAssets”, however, I still cannot implement the library

Bump.