127.0.0.1:4200 is not working

[#1]

Hi! I am new in using cloudera and  I downloaded the  Hortonworks Data Platform (HDP) for Docker for our college discussion and I followed every steps in this site: https://www.cloudera.com/tutorials/sandbox-deployment-and-install-guide/3.html. After downloading everything is fine the hdp and proxy is working in docker but when I tried to access 127.0.0.1:4200 I cannot get in.

I am using Windows 10 pro.

Also I tried to do the steps in this site but still I cannot get in: https://www.cloudera.com/tutorials/learning-the-ropes-of-the-hdp-sandbox.html

Thank you for your advanced help. 

[#2]