Local package.json exists, but node_modules missing
npm start runs a script that the app maker built for easy starting of the appnpm install installs all the packages in package.json
run npm install first
then run npm start
Just had the same error message, but when I was running a package.json with:
"scripts": { "build": "tsc -p ./src",}tsc is the command to run the TypeScript compiler.
I never had any issues with this project because I had TypeScript installed as a global module. As this project didn't include TypeScript as a dev dependency (and expected it to be installed as global), I had the error when testing in another machine (without TypeScript) and running npm install didn't fix the problem. So I had to include TypeScript as a dev dependency (npm install typescript --save-dev) to solve the problem.
This issue can also raise when you change your system password but not the same updated on your .npmrc file that exist on path C:\Users\user_name, so update your password there too.
please check on it and run npm install first and then npm start.