npm start failed to start App

Hello Folks,

I am having this issue from yesterday, When I am trying to create new app with create-react-app and trying to start it thorwing below error. Though old apps are still running. Please help me in this as I have already tried all solutions available on stackoverflow and issue list.

OS: WIN 7, NODE : 10.15.0 NPM: 6.4.1

Error On Cmd:

Starting the development server…

events.js:174 throw er; // Unhandled ‘error’ event ^

Error: spawn cmd ENOENT at Process.ChildProcess._handle.onexit (internal/child_process.js:240:19) at onErrorNT (internal/child_process.js:415:16) at process._tickCallback (internal/process/next_tick.js:63:19) Emitted ‘error’ event at: at Process.ChildProcess._handle.onexit (internal/child_process.js:246:12) at onErrorNT (internal/child_process.js:415:16) at process._tickCallback (internal/process/next_tick.js:63:19) error Command failed with exit code 1.

with Verboose : 0 info it worked if it ends with ok 1 verbose cli [ ‘C:\Program Files\nodejs\node.exe’, 1 verbose cli ‘C:\Users\Devloper\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js’, 1 verbose cli ‘start’ ] 2 info using npm@6.9.0 3 info using node@v10.15.1 4 verbose run-script [ ‘prestart’, ‘start’, ‘poststart’ ] 5 info lifecycle testapp@0.1.0~prestart: testapp@0.1.0 6 info lifecycle testapp@0.1.0~start: testapp@0.1.0 7 verbose lifecycle testapp@0.1.0~start: unsafe-perm in lifecycle true 8 verbose lifecycle testapp@0.1.0~start: PATH: C:\Users\Devloper\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin;D:\react\NoteTakingApp\testapp\node_modules.bin;C:\Program Files\nodejs;C:\Program Files\Microsoft VS Code\bin;C:\Program Files\Java\jdk1.8.0_171\bin;C:\Users\Devloper\AppData\Roaming\npm 9 verbose lifecycle testapp@0.1.0~start: CWD: D:\react\NoteTakingApp\testapp 10 silly lifecycle testapp@0.1.0~start: Args: [ ‘/d /s /c’, ‘react-scripts start’ ] 11 silly lifecycle testapp@0.1.0~start: Returned: code: 1 signal: null 12 info lifecycle testapp@0.1.0~start: Failed to exec start script 13 verbose stack Error: testapp@0.1.0 start: react-scripts start 13 verbose stack Exit status 1 13 verbose stack at EventEmitter.<anonymous> (C:\Users\Devloper\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\index.js:301:16) 13 verbose stack at EventEmitter.emit (events.js:189:13) 13 verbose stack at ChildProcess.<anonymous> (C:\Users\Devloper\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\lib\spawn.js:55:14) 13 verbose stack at ChildProcess.emit (events.js:189:13) 13 verbose stack at maybeClose (internal/child_process.js:970:16) 13 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:259:5) 14 verbose pkgid testapp@0.1.0 15 verbose cwd D:\react\NoteTakingApp\testapp 16 verbose Windows_NT 6.1.7601 17 verbose argv “C:\Program Files\nodejs\node.exe” “C:\Users\Devloper\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js” “start” 18 verbose node v10.15.1 19 verbose npm v6.9.0 20 error code ELIFECYCLE 21 error errno 1 22 error testapp@0.1.0 start: react-scripts start 22 error Exit status 1 23 error Failed at the testapp@0.1.0 start script. 23 error This is probably not a problem with npm. There is likely additional logging output above. 24 verbose exit [ 1, true ]

[creativetim]

Was helping someone with this problem on their Windows box and came across the following SO article and it did the trick.

I checked system variables one more time and found the cause of the problem: missing C:\Windows\System32\ variable. I added it and that solved my problem

More detailed instructions that didn’t get labeled as the answer:

Goto > Control Panel\System and Security\System\Advance system setting\Enviroment variable and set system variables path C:\Windows\System32\ variable and restart your System.

Took a fair amount of Googling to arrive there. Hopefully this helps people out so they aren’t forced to try a particular, now outdated, version of react-scripts just to get their React app running.

[florin1000]

Sorry, I have updated my answer. 1)remove node_modules and lock files 2)edit package.json so the new version of react-scripts is “2.1.8” 3)yarn install / npm install 4)cd your-app 5)yarn start / npm start