Integrate Photon in Ready Player Me

Hello!
I’m trying to integrate Photon into a file in my RPM package to implement multi-user functionality. When I add “using Photon.Pun”, I get this error:

Assets\Ready Player Assets\Ready Player Me\Core\Samples\QuickStart\Scripts\PersonalAvatarLoader.cs(10,14): error CS0234: The type or namespace name ‘Pun’ does not exist in the namespace ‘Photon’ (are you missing an assembly reference?)
cap

Please, I urgently need your help!