1. What happened
After successfully building a holographic remoting application the Debug console of the application states:
"UnityException: Failed to load Hololens "1" remoting plugin. Did you enable remoting in the Player Settings?"

2. How we can reproduce it using the example you attached

- Load the scene "SampleScene" from Assets/Scenes

- Switch to Universal Windows Platform if necessary under File->Build Settings...

- Check if following settings are matching:
* Initialize on Startup is unchecked in XR Plug-in Management UWP tab but Windows Mixed Reality is checked
* Initialize on Startup is checked in XR Plug-in Management Standalone tab and Windows Mixed Reality is checked
* Holographic Remoting is checked under Windows Mixed Reality in XR Plug-in Management

* InternetClientServer and PrivateNetworkClientServer are enabled in Edit->Project Settings ->Player -> Publishing Settings under Capabilities

- Build the project under File->Build Settings...

- Build the resulting Visual Studio solution in Release mode with x64 and LocalMachine