Unexpected TypeScript issue: Unable to access the 'flags' property of an undefined entity

Upon creating a new project and running the serve command, I encountered the following error: ERROR in TypeError: Cannot read property 'flags' of undefined

Node version: 12.14 NPM version: 6.13

Contents of package.json:

{
  "name": "angular-tour-of-heroes",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
   // dependencies and devDependencies here
}

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javascriptangulartypescript

Answer №1

Perhaps consider deleting your node_modules and package-lock.json files, then try running npm i -f. If you encounter issues with tsc, using yarn for installation might be a better option due to potential problems with the tsc module in npm. Make sure to investigate further!

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