PowerBI embedded- 407 error

Hello, I have a few question about power bi embedded setting for desktop.

Could someone help me here? Thank you :) !!!!!! :smileyhappy:

My boss and their boss want to use PowerBI embedded. (It's a good tool for using power bi friendly use)

Q1: But it has some problem when I setting step here by

https://docs.microsoft.com/en-us/azure/power-bi-embedded/power-bi-embedded-get-started-sample

0. I got a Workspace Collection name, and Access Key for another team.

1 Then .I've downloaded the PowerBI-embedded.sln, renewed  NuGET package

and select option 5, Provision a new workspace in an existing workspace collection.

The error happened.

But i saw the video and step on web, 

https://channel9.msdn.com/Blogs/MostafaElzoghbi/Power-BI-Embedded-Explained-Part-2 ,

it won't have the problem. QmQ  

2.Is there anything I missed aetting here? QQ

 Ooops, something broke: System.Net.Http.HttpRequestException: An error occurred
while sending the request. ---> System.Net.WebException: 遠端伺服器傳回一個錯誤:
(407) 必須 Proxy 驗證。

Thank you so much!   

BR

Candy