Error when running Ionic serve in Ionic 2

Ionic Framework ionic-v3
19

Of course you have to install them again as it has been already written above.

I would suggest you to complete the following steps in this particular order:

  1. Delete the node_modules folder underneath your project’s folder.
  2. Find Node.js command prompt, right click on it and select Run as Administrator.
  3. Navigate inside your project’s folder and run npm install from there.
  4. Observe if there are any NPM errors during the reinstall, i.e. lines starting with npm ERR!.
  5. After the node modules are reinstalled try running ionic serve.
  6. If it doesn’t work then check this SO answer or perform the node-gyp install for Win 10.
  7. If you had to perform the step above then also reinstall node-sass.

If you get any errors while performing the steps above, could you share them here, and the output of ionic info might be also helpful.