I can't run the package nls in my windows CLI

I followed the steps to create the nls package :

and when I typed the command ‘nls’ in the cli, I get this error:


Here is some other useful information that will aid you in helping me

More info:

Should I provide more information in my OP?

You didn’t really explain anything, you just posted a bunch of images. As this is for a Udemy course I would assume there is some kind of support.