node.js - Nodejs environment configuration installation module test error

Question

After creating new global and cache files and setting environment variables, an error occurred like this. According to the blog's practice, I don't know which step is wrong

Answer 1

Judging from the error message, it may be a permissions issue. You can try running the command line with administrator rights

Answer 2

Open with administrator

Answer 3

You try sudo npm istall express -g and then enter your computer password. Maybe the permissions are not turned on