An unhandled exception occurred while processing the request

Question

An unhandled exception occurred while processing the request.

AggregateException: One or more errors occurred. (One or more errors occurred. (The NPM script 'start' exited without indicating that the Angular CLI was listening for requests. The error output was: Error: EPERM: operation not permitted, mkdir 'C:\Windows\system32\config\systemprofile\AppData\Roaming\npm'

TypeError: Cannot read property 'get' of undefined

at errorMessage (C:\Program Files\nodejs\node_modules\npm\lib\utils\error-message.js:38:39)

at errorHandler (C:\Program Files\nodejs\node_modules\npm\lib\utils\error-handler.js:201:13)

at C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js:78:20

at cb (C:\Program Files\nodejs\node_modules\npm\lib\npm.js:225:22)

at C:\Program Files\nodejs\node_modules\npm\lib\npm.js:263:24

at C:\Program Files\nodejs\node_modules\npm\lib\config\core.js:81:7

at Array.forEach (<anonymous>)

at C:\Program Files\nodejs\node_modules\npm\lib\config\core.js:80:13

at f (C:\Program Files\nodejs\node_modules\npm\node_modules\once\once.js:25:25)

at afterExtras (C:\Program Files\nodejs\node_modules\npm\lib\config\core.js:171:20)

C:\Program Files\nodejs\node_modules\npm\lib\utils\error-handler.js:97

var doExit = npm.config.loaded ? npm.config.get('_exit') : true