在开始新的反应项目时，我遇到了这个问题

Question

When I run npm start , I get this error. What is the solution for this?

Answer 1

This issue has been addressed here , you can refer to it.

Complete solution is

• First add Poweshell to PATH as %SystemRoot%/system32/WindowsPowerShell/v1.0 .
• open powershell as admin and write this command Set-ExecutionPolicy Unrestricted -Scope CurrentUser -Force .
• last thing fire npm-windows-upgrade .

Answer 2

Check your node version. update node & npm try sudo npm start if you are in macOS or linux try to download create-react-app again npm i -g create-react-app try to create the app in another folder create-react-app APPNAME Still not working? Then delete node module folder and run npm install Not yet? delete both node module & package-lock.json and npm install Try to run on another PORT