Error: EPERM: operation not permitted, mkdir 'C:\Users\User' command not found: create-next-app
//For React app...
// first run this command
npm install -g create-react-app
// then run this one.
npx create-react-app
//For Next js...
//first run this command
npm install -g create-next-app
//then run this command
npx create-next-app