What to do when you encounter this error while generating an ionic v4 app?

What to do when you encounter this error while generating an ionic app?

> npm i

npm WARN deprecated tslint@6.1.2: TSLint has been deprecated in favor of ESLint. Please see https://github.com/palantir/tslint/issues/4534 for more information.

npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142

npm WARN deprecated fsevents@1.2.13: fsevents 1 will break on node v14+ and could be using insecure binaries. Upgrade to fsevents 2.

npm ERR! Unexpected end of JSON input while parsing near '...lar/compiler-cli/-/co'

npm ERR! A complete log of this run can be found in:

npm ERR!     /Users/lookang/.npm/_logs/2020-05-20T09_09_02_104Z-debug.log

[ERROR] An error occurred while running subprocess npm.

https://stackoverflow.com/questions/61605380/angular-9-issue-unable-to-run-the-initial-application

the solution is  to reinstall Angular CLI after clearing npm cache

$ npm cache clean --force

$ npm install -g @angular/cli@latest