Problem on the tutorial Holograms 211

Hello everybody

I'm currently trying to do the tutorial 211 for the HoloLens
I did the 2 first tutorials, and now I'm trying to do this one.
I'm blocked at the chapter 1, after trying to deploy the App on the HoloLens
Basically, I cannot deploy it, and Visual Studio is saying to me that the command stopped with the error code 1

Can you help me please ?

Thank you