Remote connection to Hololens2 not working

Hello!

I’m having trouble using Unity with Hololens2.

When trying to connect to the device, I’m receiving the following error:

in Unity2020.1.0f1:

UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)```

in Unity2019.4:
```Disconnected with error ProtocolVersionMismatch
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()```

When I'm using a Windows native sample in Visual Studio, I can connect to the device and run my code, so it's not WiFi or the Hololens, it's something in Unity.

Any ideas what might me going on?

Okay, now I found out that you need to have the “holographic remoting app” installed and running on the Hololens when trying to connect.

But it’s not work.I do everything it says in document,Only successed by once.After that, it keeps never work.