[SOLVED] Building error

Hello everyone,
I have a problem when building my UWA project with the last version of Photon Voice plugin: each time, I get an GetFileByPath(filePath) == NULL UnityEditor.HostView:OnGUI() error.

I also tried to build the demo scene on an empty project in UWP but still the same error.
Unity Version: 5.4.0b18




Thanks