Help with null reference in punrpc call

Hi,
I'm getting a null reference to another game object in class.

I have a manager that exists in the scene, this instantiates an IngamePlayer which has a photonview component.

The IngamePlayer has a reference to the manager so it can call other methods such as showing UI elements.

The IngamePlayer then communicates with the other online players via PunRPC calls.

However when an InGamePlayer receives a PunRPC call, inside that method, the ref|rence to manager is null.

How can I fix this? Do a GameObject.Find? Add a Photon View to my manager gameobject?