When I run npm start in powershell is shows the following error error:
PS C:\Users\UTKARSH\Desktop\react_native\my_project> npm start @ start C:\Users\UTKARSH\Desktop\react_native\my_project expo start Starting project at C:\Users\UTKARSH\Desktop\react_native\my_project Cannot determine which native SDK version your project uses because the module `expo` is not installed. Please install it with `yarn add expo` and try again. ConfigError: Cannot determine which native SDK version your project uses because the module `expo` is not installed. Please install it with `yarn add expo` and try again. at Object.getExpoSDKVersion (C:\Users\UTKARSH\AppData\Roaming\npm\node_modules\expo-cli\node_modules\@expo\config\src\Project.ts:22:9) at ensureConfigHasDefaultValues (C:\Users\UTKARSH\AppData\Roaming\npm\node_modules\expo-cli\node_modules\@expo\config\src\Config.ts:419:22) at fillAndReturnConfig (C:\Users\UTKARSH\AppData\Roaming\npm\node_modules\expo-cli\node_modules\@expo\config\src\Config.ts:101:10) at getConfig (C:\Users\UTKARSH\AppData\Roaming\npm\node_modules\expo-cli\node_modules\@expo\config\src\Config.ts:137:10) at configureProjectAsync (C:\Users\UTKARSH\AppData\Roaming\npm\node_modules\expo-cli\src\commands\start.ts:288:25) at action (C:\Users\UTKARSH\AppData\Roaming\npm\node_modules\expo-cli\src\commands\start.ts:164:34) at C:\Users\UTKARSH\AppData\Roaming\npm\node_modules\expo-cli\src\commands\start.ts:341:16 at Command.<anonymous> (C:\Users\UTKARSH\AppData\Roaming\npm\node_modules\expo-cli\src\exp.ts:82:7) npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! @ start: `expo start` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the @ start script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above. npm ERR! A complete log of this run can be found in: npm ERR! C:\Users\UTKARSH\AppData\Roaming\npm-cache\_logs\2020-05-15T07_09_48_901Z-debug.log PS C:\Users\UTKARSH\Desktop\react_native\my_project> clear
How can I fix this?
I just had this problem. I solved it like this:
I was using old Node version with NVM. I changed to the last node version
nvm use 12.x.x
with nvm and updated:
yarn global add expo-cli
but, you need run
npm install expo-cli --global
for npm. After that, I changed back to the old version:
nvm use 10.x.x
and ran
yarn start
or
npm start
This solved the issue.