Photon Voice breaks Photon Unity Networking

Using Unity 5.6.0f3 - installing from Unity Asset Store.

Import/Installing Photon Unity Networking (Free) without issue, all demos work. Install Photon Voice second, errors start to occur:

"Assets/Photon Unity Networking/Demos/DemoRockPaperScissors/Scripts/RpsDemoConnect.cs(122,23): error CS0115: `RpsDemoConnect.OnPhotonPlayerActivityChanged(PhotonPlayer)' is marked as an override but no suitable method found to override"

Deleting PUNVoice folder and reinstalling Photon Unity Networking (Free) removes the errors.